Company lists · Data refreshed November 2026
Top 25 Due diligence security firms based in Australia
RevenueBase identified 219 company matches for due diligence security firms associated with Australia as of November 2026 and tracks 88,473 professional contacts across them, including 783 with verified work emails. Melbourne is the largest hub.
This list covers company matches for due diligence security firms associated with Australia, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest due diligence security firms based in Australia
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 242 contacts → | ||||
Exact match “We know how to offer the most effective security to our customers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 196 contacts → | ||||
Exact match “For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 95 contacts → | ||||
Exact match “Established in 2001, ISEC is a leading provider of protective security, safety, risk management, and training services to the corporate, commercial and government sectors.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 93 contacts → | ||||
Exact match “National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 73 contacts → | ||||
Exact match “With a history dating back to 1979, Risk & Security Management is Australia’s leading provider of mercantile and investigation services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 66 contacts → | ||||
Exact match “For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 65 contacts → | ||||
Exact match “Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company with 20 years of…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 50 contacts → | ||||
Exact match “Reddawn provides industry leading, comprehensive Security and Risk Management solutions for both corporate and commercial.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 43 contacts → | ||||
Exact match “We are specialist industry specialists.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 41 contacts → | ||||
Exact match “Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 41 contacts → | ||||
Exact match “Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 40 contacts → | ||||
Exact match “Barringtons delivers customised business solutions guided by our philosophy: Best People.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 38 contacts → | ||||
Exact match “Detective Services (DS) owned & operated by e Mark Grover in Melbourne, one of Australia's most sought after successful private investigators, having worked in the investigation &…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 35 contacts → | ||||
Exact match “ANSIC is an Australian-based security, investigation & risk management firm, with recognised global capabilities and affiliates.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 34 contacts → | ||||
Exact match “FBIS International Issues Management Pty Ltd For the past 19 years FBIS International Issues Management has investigated and resolved business issues and threats with complete…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 30 contacts → | ||||
Exact match “The Security Hub delivers a complete packaged security solution and a risk mitigation program to its clients.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 29 contacts → | ||||
Exact match “The SureFact Group P/L is a privately owned Investigation’s Company providing tailored solutions to Insurance Companies, Large Corporate Organisations, Small to Medium Employers…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 23 contacts → | ||||
Exact match “At Oracle Investigation Services, our aptitude is one of expertise, integrity and pursuit of the truth.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 18 contacts → | ||||
Exact match “High Risk Security Group (Asia-Pacific)(“HRSG”), is a highly respected and professional safety and security consultancy company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 17 contacts → | ||||
Exact match “Core Integrity is an integrity risk advisory firm driven by a purpose to help people do the right thing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 16 contacts → | ||||
Exact match “OMEN provides specialist security solutions across a broad range of industries, including aviation and other critical infrastructure.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 16 contacts → | ||||
Exact match “Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 23 | 14 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 24 | 12 contacts → | ||||
Exact match “Full suite of security services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 25 | 12 contacts → | ||||
Exact match “Wise McGrath is a leading commercial services company which specialises in delivering an innovative range of integrated support services across industries where compliance and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “due diligence security firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 219 due diligence security firms based in Australia
See the full list, filter by size, metro and specialty, and access 783 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Due diligence security firms based in Australia at a glance
As of Nov 5, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 219 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with Australia whose business descriptions match “due diligence security firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 783 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Due diligence security firms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “due diligence security firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many due diligence security firms are there based in Australia?
RevenueBase identified 219 company matches for due diligence security firms associated with Australia as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Securitas Australia tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most due diligence security firms?
Melbourne leads with 45 company records, followed by Sydney (39) and Perth (11).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 783 professional contacts with verified work emails tracked across these 219 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 219 due diligence security firms based in Australia. Start with a free account, no credit card.
Download this list →Related lists
Due diligence security firms by geography
- Due diligence security firms based in Melbourne, Australia
- Due diligence security firms based in Sydney, Australia
- Due diligence security firms based in Sao Paulo, Brazil
- Due diligence security firms based in Calgary, Canada
- Due diligence security firms based in Ottawa, Canada
- Due diligence security firms based in Toronto, Canada
- Due diligence security firms based in Paris, France
- Due diligence security firms based in Berlin, Germany
- Due diligence security firms based in Bangalore, India
- Due diligence security firms based in Chennai, India
- Due diligence security firms based in Gurgaon, India
- Due diligence security firms based in Mumbai, India
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Due diligence security firms based in Melbourne, Australia
- Due diligence security firms based in Sydney, Australia
- Due diligence security firms based in Sao Paulo, Brazil
- Due diligence security firms based in Calgary, Canada
- Due diligence security firms based in Ottawa, Canada
- Due diligence security firms based in Toronto, Canada
Company intelligence · public preview
Top 25 due diligence security firms based in Australia
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 219 matching company records for due diligence security firms based in Australia, with 88,473 tracked contacts and 783 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 due diligence security firms based in Australia
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Securitas Australiasecuritas-australia.com.auHQ: Preston, AustraliaReported employees: 10001+ | Preston, Australia | 10001+ | Exact match | 242 contacts → |
“We know how to offer the most effective security to our customers.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  ADT Security Australiaadtsecurity.com.auHQ: Rydalmere, AustraliaReported employees: 501-1,000 | Rydalmere, Australia | 501-1,000 | Exact match | 196 contacts → |
“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  ISECisec.com.auHQ: Alexandria, AustraliaReported employees: 201-500 | Alexandria, Australia | 201-500 | Exact match | 95 contacts → |
“Established in 2001, ISEC is a leading provider of protective security, safety, risk management, and training services to the corporate, commercial and government sectors.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  National Protective Servicesnationalprotectiveservices.com.auHQ: South Melbourne, AustraliaReported employees: 1,001-5,000 | South Melbourne, Australia | 1,001-5,000 | Exact match | 93 contacts → |
“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Risk & Security Managementrisksec.com.auHQ: Brisbane Cbd, AustraliaReported employees: 51-200 | Brisbane Cbd, Australia | 51-200 | Exact match | 73 contacts → |
“With a history dating back to 1979, Risk & Security Management is Australia’s leading provider of mercantile and investigation services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  LKA Grouplkagroup.com.auHQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 66 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Exec Securityexecsecurity.com.auHQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 65 contacts → |
“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company with 20 years of…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Reddawn Australia PTY LTDreddawn.com.auHQ: Sydney Olympic Park, AustraliaReported employees: 201-500 | Sydney Olympic Park, Australia | 201-500 | Exact match | 50 contacts → |
“Reddawn provides industry leading, comprehensive Security and Risk Management solutions for both corporate and commercial.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Austagencies PTY LTDaustagencies.com.auHQ: North Sydney, AustraliaReported employees: 51-200 | North Sydney, Australia | 51-200 | Exact match | 43 contacts → |
“We are specialist industry specialists.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Brooksight Investigationsbrooksight.com.auHQ: Gold Coast, AustraliaReported employees: 51-200 | Gold Coast, Australia | 51-200 | Exact match | 41 contacts → |
“Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Vectravectra-corp.comHQ: Adelaide, AustraliaReported employees: 51-200 | Adelaide, Australia | 51-200 | Exact match | 41 contacts → |
“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Barrington Group Australiabarringtongroup.com.auHQ: Norwest, AustraliaReported employees: 51-200 | Norwest, Australia | 51-200 | Exact match | 40 contacts → |
“Barringtons delivers customised business solutions guided by our philosophy: Best People.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Detective Services DSdetectiveservices.com.auHQ: South Melbourne, AustraliaReported employees: Not recorded | South Melbourne, Australia | Not recorded | Exact match | 38 contacts → |
“Detective Services (DS) owned & operated by e Mark Grover in Melbourne, one of Australia's most sought after successful private investigators, having worked in the investigation &…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  ANSICansic.com.auHQ: Bowen Hills, AustraliaReported employees: 51-200 | Bowen Hills, Australia | 51-200 | Exact match | 35 contacts → |
“ANSIC is an Australian-based security, investigation & risk management firm, with recognised global capabilities and affiliates.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Fbis Internationalfbis.com.auHQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 34 contacts → |
“FBIS International Issues Management Pty Ltd For the past 19 years FBIS International Issues Management has investigated and resolved business issues and threats with complete…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  The Security HUBthesecurityhub.com.auHQ: Melbourne, AustraliaReported employees: 201-500 | Melbourne, Australia | 201-500 | Exact match | 30 contacts → |
“The Security Hub delivers a complete packaged security solution and a risk mitigation program to its clients.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  The Surefact Groupthesurefactgroup.comHQ: Port Melbourne, AustraliaReported employees: 51-200 | Port Melbourne, Australia | 51-200 | Exact match | 29 contacts → |
“The SureFact Group P/L is a privately owned Investigation’s Company providing tailored solutions to Insurance Companies, Large Corporate Organisations, Small to Medium Employers…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Oracle Investigation Servicesoisglobal.com.auHQ: Blackburn North, AustraliaReported employees: 51-200 | Blackburn North, Australia | 51-200 | Exact match | 23 contacts → |
“At Oracle Investigation Services, our aptitude is one of expertise, integrity and pursuit of the truth.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Hrsg High Risk Security Grouphrsg.com.auHQ: Darwin, AustraliaReported employees: 51-200 | Darwin, Australia | 51-200 | Exact match | 18 contacts → |
“High Risk Security Group (Asia-Pacific)(“HRSG”), is a highly respected and professional safety and security consultancy company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Core Integrity PTY LTDcoreintegrity.com.auHQ: Crows Nest, AustraliaReported employees: 11-50 | Crows Nest, Australia | 11-50 | Exact match | 17 contacts → |
“Core Integrity is an integrity risk advisory firm driven by a purpose to help people do the right thing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Omen Security PTY LTDomensecurity.com.auHQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 16 contacts → |
“OMEN provides specialist security solutions across a broad range of industries, including aviation and other critical infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Morrisecmorrisec.com.auHQ: Sydney, AustraliaReported employees: 11-50 | Sydney, Australia | 11-50 | Exact match | 16 contacts → |
“Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Nova Security Groupnovasecuritygroup.com.auHQ: Sydney, AustraliaReported employees: 201-500 | Sydney, Australia | 201-500 | Exact match | 14 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 |  Safer Community Securitysafercommunity.com.auHQ: West Perth, AustraliaReported employees: 51-200 | West Perth, Australia | 51-200 | Exact match | 12 contacts → |
“Full suite of security services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Wise Mcgrathwisemcgrath.com.auHQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 12 contacts → |
“Wise McGrath is a leading commercial services company which specialises in delivering an innovative range of integrated support services across industries where compliance and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 219 company matches
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Due diligence security firms: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
214 records in the displayed employee bands.
5 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 219 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Due diligence security firms by metro
Questions about this company list
What does Exact match mean for due diligence security firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many due diligence security firms did RevenueBase find based in Australia?
The saved snapshot records 219 matching company records, 88,473 tracked contacts and 783 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Due diligence security firms by geography
- Due diligence security firms based in Melbourne, Australia
- Due diligence security firms based in Sydney, Australia
- Due diligence security firms based in Sao Paulo, Brazil
- Due diligence security firms based in Calgary, Canada
- Due diligence security firms based in Ottawa, Canada
- Due diligence security firms based in Toronto, Canada
- Due diligence security firms based in Paris, France
- Due diligence security firms based in Berlin, Germany
- Due diligence security firms based in Bangalore, India
- Due diligence security firms based in Chennai, India
- Due diligence security firms based in Gurgaon, India
- Due diligence security firms based in Mumbai, India
Cite this list
RevenueBase Data Team. Top 25 due diligence security firms based in Australia. Snapshot: November 5, 2026. https://revenuebase.ai/companies/due-diligence-security-firms/australia.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Due diligence security firms based in Melbourne, Australia
- Due diligence security firms based in Sydney, Australia
- Due diligence security firms based in Sao Paulo, Brazil
- Due diligence security firms based in Calgary, Canada
- Due diligence security firms based in Ottawa, Canada
- Due diligence security firms based in Toronto, Canada
Company intelligence · public preview
Top 25 due diligence security firms based in Australia
RevenueBase records 219 matching company records for due diligence security firms based in Australia, with 88,473 tracked contacts and 783 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 due diligence security firms based in Australia
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Securitas Australiasecuritas-australia.com.au HQ: Preston, AustraliaReported employees: 10001+ | Preston, Australia | 10001+ | Exact match | 242 contacts → |
“We know how to offer the most effective security to our customers.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | ADT Security Australiaadtsecurity.com.au HQ: Rydalmere, AustraliaReported employees: 501-1,000 | Rydalmere, Australia | 501-1,000 | Exact match | 196 contacts → |
“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | ISECisec.com.au HQ: Alexandria, AustraliaReported employees: 201-500 | Alexandria, Australia | 201-500 | Exact match | 95 contacts → |
“Established in 2001, ISEC is a leading provider of protective security, safety, risk management, and training services to the corporate, commercial and government sectors.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | National Protective Servicesnationalprotectiveservices.com.au HQ: South Melbourne, AustraliaReported employees: 1,001-5,000 | South Melbourne, Australia | 1,001-5,000 | Exact match | 93 contacts → |
“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Risk & Security Managementrisksec.com.au HQ: Brisbane Cbd, AustraliaReported employees: 51-200 | Brisbane Cbd, Australia | 51-200 | Exact match | 73 contacts → |
“With a history dating back to 1979, Risk & Security Management is Australia’s leading provider of mercantile and investigation services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | LKA Grouplkagroup.com.au HQ: Carlton, AustraliaReported employees: 51-200 | Carlton, Australia | 51-200 | Exact match | 66 contacts → |
“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Exec Securityexecsecurity.com.au HQ: Melbourne, AustraliaReported employees: 501-1,000 | Melbourne, Australia | 501-1,000 | Exact match | 65 contacts → |
“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company with 20 years of…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Reddawn Australia PTY LTDreddawn.com.au HQ: Sydney Olympic Park, AustraliaReported employees: 201-500 | Sydney Olympic Park, Australia | 201-500 | Exact match | 50 contacts → |
“Reddawn provides industry leading, comprehensive Security and Risk Management solutions for both corporate and commercial.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Austagencies PTY LTDaustagencies.com.au HQ: North Sydney, AustraliaReported employees: 51-200 | North Sydney, Australia | 51-200 | Exact match | 43 contacts → |
“We are specialist industry specialists.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Brooksight Investigationsbrooksight.com.au HQ: Gold Coast, AustraliaReported employees: 51-200 | Gold Coast, Australia | 51-200 | Exact match | 41 contacts → |
“Brooksight Investigations are one of the most respected investigation teams operating throughout Australia.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Vectravectra-corp.com HQ: Adelaide, AustraliaReported employees: 51-200 | Adelaide, Australia | 51-200 | Exact match | 41 contacts → |
“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Barrington Group Australiabarringtongroup.com.au HQ: Norwest, AustraliaReported employees: 51-200 | Norwest, Australia | 51-200 | Exact match | 40 contacts → |
“Barringtons delivers customised business solutions guided by our philosophy: Best People.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Detective Services DSdetectiveservices.com.au HQ: South Melbourne, AustraliaReported employees: Not recorded | South Melbourne, Australia | Not recorded | Exact match | 38 contacts → |
“Detective Services (DS) owned & operated by e Mark Grover in Melbourne, one of Australia's most sought after successful private investigators, having worked in the investigation &…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | ANSICansic.com.au HQ: Bowen Hills, AustraliaReported employees: 51-200 | Bowen Hills, Australia | 51-200 | Exact match | 35 contacts → |
“ANSIC is an Australian-based security, investigation & risk management firm, with recognised global capabilities and affiliates.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Fbis Internationalfbis.com.au HQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 34 contacts → |
“FBIS International Issues Management Pty Ltd For the past 19 years FBIS International Issues Management has investigated and resolved business issues and threats with complete…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | The Security HUBthesecurityhub.com.au HQ: Melbourne, AustraliaReported employees: 201-500 | Melbourne, Australia | 201-500 | Exact match | 30 contacts → |
“The Security Hub delivers a complete packaged security solution and a risk mitigation program to its clients.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | The Surefact Groupthesurefactgroup.com HQ: Port Melbourne, AustraliaReported employees: 51-200 | Port Melbourne, Australia | 51-200 | Exact match | 29 contacts → |
“The SureFact Group P/L is a privately owned Investigation’s Company providing tailored solutions to Insurance Companies, Large Corporate Organisations, Small to Medium Employers…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Oracle Investigation Servicesoisglobal.com.au HQ: Blackburn North, AustraliaReported employees: 51-200 | Blackburn North, Australia | 51-200 | Exact match | 23 contacts → |
“At Oracle Investigation Services, our aptitude is one of expertise, integrity and pursuit of the truth.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Hrsg High Risk Security Grouphrsg.com.au HQ: Darwin, AustraliaReported employees: 51-200 | Darwin, Australia | 51-200 | Exact match | 18 contacts → |
“High Risk Security Group (Asia-Pacific)(“HRSG”), is a highly respected and professional safety and security consultancy company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Core Integrity PTY LTDcoreintegrity.com.au HQ: Crows Nest, AustraliaReported employees: 11-50 | Crows Nest, Australia | 11-50 | Exact match | 17 contacts → |
“Core Integrity is an integrity risk advisory firm driven by a purpose to help people do the right thing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Omen Security PTY LTDomensecurity.com.au HQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 16 contacts → |
“OMEN provides specialist security solutions across a broad range of industries, including aviation and other critical infrastructure.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Morrisecmorrisec.com.au HQ: Sydney, AustraliaReported employees: 11-50 | Sydney, Australia | 11-50 | Exact match | 16 contacts → |
“Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Nova Security Groupnovasecuritygroup.com.au HQ: Sydney, AustraliaReported employees: 201-500 | Sydney, Australia | 201-500 | Exact match | 14 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 | Safer Community Securitysafercommunity.com.au HQ: West Perth, AustraliaReported employees: 51-200 | West Perth, Australia | 51-200 | Exact match | 12 contacts → |
“Full suite of security services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Wise Mcgrathwisemcgrath.com.au HQ: Sydney, AustraliaReported employees: 51-200 | Sydney, Australia | 51-200 | Exact match | 12 contacts → |
“Wise McGrath is a leading commercial services company which specialises in delivering an innovative range of integrated support services across industries where compliance and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 219 company matches
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Due diligence security firms: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
214 records in the displayed employee bands.
5 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 219 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Due diligence security firms by metro
Questions about this company list
What does Exact match mean for due diligence security firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many due diligence security firms did RevenueBase find based in Australia?
The saved snapshot records 219 matching company records, 88,473 tracked contacts and 783 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Due diligence security firms by geography
- Due diligence security firms based in Melbourne, Australia
- Due diligence security firms based in Sydney, Australia
- Due diligence security firms based in Sao Paulo, Brazil
- Due diligence security firms based in Calgary, Canada
- Due diligence security firms based in Ottawa, Canada
- Due diligence security firms based in Toronto, Canada
- Due diligence security firms based in Paris, France
- Due diligence security firms based in Berlin, Germany
- Due diligence security firms based in Bangalore, India
- Due diligence security firms based in Chennai, India
- Due diligence security firms based in Gurgaon, India
- Due diligence security firms based in Mumbai, India
Cite this list
RevenueBase Data Team. Top 25 due diligence security firms based in Australia. Snapshot: November 5, 2026. https://revenuebase.ai/companies/due-diligence-security-firms/australia.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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