Company lists · Data refreshed September 2026

Top 25 Private security firms based in Australia

RevenueBase identified 517 private security firms headquartered in Australia as of September 2026 and tracks 10,605 professional contacts across them, including 1,925 with verified work emails and 382 with mobile numbers. Sydney is the largest hub.

This list covers private security firms headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
517Companies
10,605Contacts tracked
1,925Verified emails
382Mobile numbers
Unlock all 517 companies Free signup · no credit card · 500 free credits

The 25 largest private security firms based in Australia

Ranked by team size
Top 25 of 517 private security firms based in Australia, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names private security firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
MSS SecurityPartial evidence
Parramatta, AustraliaHQ checked Sep 5, 20265,001-10,0002,010

“The MSS Security Group (MSS) comprising MSS Security, MSS Strategic Medical & Rescue and SDS is unrivalled in its experience, capability and reputation.”

Source: company website · checked Sep 5, 2026
2
Wilson SecurityPartial evidence
Essendon Fields, AustraliaHQ checked Sep 5, 20265,001-10,0001,813

“At Wilson Security, we are committed to building a safer future for everyone.”

Source: company website · checked Sep 5, 2026
3
SecurecorpIndirect evidence
Mulgrave, AustraliaHQ checked Sep 5, 20261,001-5,000630

“Securecorp employ more than 2,500 staff across Australia and have an annual turnover in excess of $100 million.”

Source: company website · checked Sep 5, 2026
4
SNP SecurityPartial evidence
West Ryde, AustraliaHQ checked Sep 5, 20261,001-5,000510

“Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.”

Source: company website · checked Sep 5, 2026
5
Southern Cross ProtectionIndirect evidence
Silverwater, AustraliaHQ checked Sep 5, 2026501-1,000288

“Established over 100 years ago, Southern Cross Protection is an Australian-owned and operated company.”

Source: company website · checked Sep 5, 2026
6
MA Services GroupIndirect evidence
Keilor Park, AustraliaHQ checked Sep 5, 20265,001-10,000274

“MA Services Group is a 100% Australian owned company, founded with the vision of providing high performance, customer centric services in a safe and fair environment.”

Source: company website · checked Sep 5, 2026
7
Securitas AustraliaPartial evidence
Preston, AustraliaHQ checked Sep 5, 202610001+228

“We know how to offer the most effective security to our customers.”

Source: company website · checked Sep 5, 2026
8
AcesgroupPartial evidence
Redfern, AustraliaHQ checked Sep 5, 20261,001-5,000198

“ACES Group, an Australian owned security organisation delivers security, risk and safety management, event management and training services to multiple industries including…”

Source: company website · checked Sep 5, 2026
9
ADT Security AustraliaIndirect evidence
Rydalmere, AustraliaHQ checked Sep 5, 2026501-1,000178

“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.”

Source: company website · checked Sep 5, 2026
10
ISECPartial evidence
Alexandria, AustraliaHQ checked Sep 5, 2026201-50087

“Established in 2001, ISEC is a leading provider of protective security, safety, risk management, and training services to the corporate, commercial and government sectors.”

Source: company website · checked Sep 5, 2026
11South Melbourne, AustraliaHQ checked Sep 5, 20261,001-5,00082

“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…”

Source: company website · checked Sep 5, 2026
12
Infront Security ServicesPartial evidence
Brisbane, AustraliaHQ checked Sep 5, 2026201-50082

“Infront Security Services was established in 2002 to provide a fresh alternative to the Qld security marketplace, focussing predominately on event management and crowd control…”

Source: company website · checked Sep 5, 2026
13
AG Security GroupPartial evidence
Adelaide, AustraliaHQ checked Sep 5, 202651-20074

“AG Security Group is South Australia's leading and largest locally owned security organisation that has been protecting Australians for more than 35 years.”

Source: company website · checked Sep 5, 2026
14Melbourne, AustraliaHQ checked Sep 5, 2026201-50071

“ABOUT US Nexar Group foundations are built on driving change and evolution to not only the security industry, but for all of our services.”

Source: company website · checked Sep 5, 2026
15
ConstantPartial evidence
Parramatta, AustraliaHQ checked Sep 5, 2026501-1,00067

“Constant, a wholly owned Australian company, was established in 2003 providing peace of mind for our clients to get on with what is important for them, by securing their valuable…”

Source: company website · checked Sep 5, 2026
16Sydney, AustraliaHQ checked Sep 5, 2026n/a66

“Commander Security Services is an Australian owned and operated company that has been created, and its foundations built on over 25 years’ experience in the security industry.”

Source: company website · checked Sep 5, 2026
17
CPS Security ServicesPartial evidence
Epping, AustraliaHQ checked Sep 5, 202651-20065

“We are CPS Security Services, a 100% Australian-owned and operated company founded in 2006.”

Source: company website · checked Sep 5, 2026
18
Monjon AustraliaPartial evidence
Cheltenham, AustraliaHQ checked Sep 5, 2026201-50064

“Monjon (Australia) Pty Ltd (Monjon) is a family owned business with over two decades of experience in the provision of security risk management solutions for residential…”

Source: company website · checked Sep 5, 2026
19
Exec SecurityPartial evidence
Melbourne, AustraliaHQ checked Sep 5, 2026501-1,00059

“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company that specialises in…”

Source: company website · checked Sep 5, 2026
20
LKA GroupIndirect evidence
Carlton, AustraliaHQ checked Sep 5, 202651-20059

“For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.”

Source: company website · checked Sep 5, 2026
21Melbourne, AustraliaHQ checked Sep 5, 2026501-1,00055

“Australian owned Advent Security has been a leader in providing exceptional, value-for-money services to local, national and international clients in the public, private and…”

Source: company website · checked Sep 5, 2026
22Sydney, AustraliaHQ checked Sep 5, 2026201-50053

“Guardian Venue Management International is a proudly Australian-owned company, dedicated to delivering the highest standards of Security Solutions, Customized Protection, Traffic…”

Source: company website · checked Sep 5, 2026
23
Premium SolutionsPartial evidence
Woollahra, AustraliaHQ checked Sep 5, 202651-20052

“Combining the very best personnel, processes and technology, Premium Solutions will redefine your expectations of the security industry.”

Source: company website · checked Sep 5, 2026
24
Fortis SecurityPartial evidence
Melbourne, AustraliaHQ checked Sep 5, 202651-20051

“Welcome to Fortis Security, founded in September of 2013, Fortis has grown year on year with customer support.”

Source: company website · checked Sep 5, 2026
25
Vibrant ServicesIndirect evidence
Coburg North, AustraliaHQ checked Sep 5, 2026201-50051

“Welcome to Vibrant Services.”

Source: company website · checked Sep 5, 2026

Showing 25 of 517 private security firms based in Australia

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Private security firms based in Australia at a glance

As of Sep 5, 2026
11-50Median size (employees)
SydneyLargest hub · 62 HQs
382Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
139
11-50
160
51-200
140
201-500
43
501-1,000
12
1,001-5,000
12
5,001-10,000
3
10001+
1

Verified emails by last verification

0–30
1,781
31–60
140
61–90
0
90–180
0
180+
4

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among private security firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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
Companies headquartered in Australia whose own description of what they do matches “private security firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among private security firms, and records with no verified work email. Companies headquartered outside Australia are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,925 across the full list. 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 September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Private security firms by metro

  • Private security firms in Sydney62
  • Private security firms in Melbourne56

Frequently asked

How many private security firms are there based in Australia?

RevenueBase identified 517 private security firms headquartered in Australia as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

MSS Security, headquartered in Parramatta, tops this list with the largest team on record.

Which city has the most private security firms?

Sydney leads with 62 headquartered companies, followed by Melbourne (56) and Brisbane (20).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,925 verified decision-maker contacts tracked across these 517 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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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.