Company lists · Data refreshed September 2026

Top 25 Infrastructure hardening contractors based in Australia

Name: Infrastructure hardening contractors based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 127 companies tracked

RevenueBase identified 127 company matches for infrastructure hardening contractors associated with Australia as of September 2026 and tracks 792 professional contacts across them, including 371 with verified work emails. Sydney is the largest hub.

This list covers company matches for infrastructure hardening contractors 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 September 17, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

127Companies

792Contacts tracked

371Verified emails

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The 25 largest infrastructure hardening contractors based in Australia

Ranked by team size

Top 25 of 127 company matches for infrastructure hardening contractors based in Australia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Security Consulting Group PTY LTD SCG	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	51-200	52 contacts →
	Exact match “SCG specialises in providing independent security and communications engineering, and security threat and risk consultancy services, to clients operating in challenging security…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Polyseal Group Australia	Exact match	St Peters, AustraliaHQ recorded Sep 17, 2026	201-500	51 contacts →
	Exact match “Since its inception in 1989, Polyseal has remained a prominent contractor in the Australia waterproofing and remedial markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Vectra	Exact match	Adelaide, AustraliaHQ recorded Sep 17, 2026	51-200	42 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 · Sep 17, 2026 · View company records in RevenueBase
4	Opusv Tech Group	Exact match	Oakleigh, AustraliaHQ recorded Sep 17, 2026	11-50	28 contacts →
	Exact match “OpusV has been operating in the infrastructure design and support space for over 20 years.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Omen Security PTY LTD	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	51-200	20 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 · Sep 17, 2026 · View company records in RevenueBase
6	Cybersecon	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	11-50	18 contacts →
	Exact match “CyberSecOn is an Information security company with a presence in Australia, USA and India.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Security Centric	Exact match	Sydney Cbd, AustraliaHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Security Centric is a boutique specialist information security consulting and services organisation.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Zynet PTY LTD	Exact match	Tullamarine, AustraliaHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Zynet is an Australian cyber security and IT services provider with more than 25 years of experience protecting organisations and keeping critical systems running.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Morfit Group Consulting	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	51-200	15 contacts →
	Exact match “Morfit Group Consulting is a pure IT Consulting and Professional Services organisation.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Mercury Information Security Services	Exact match	Sydney, AustraliaHQ recorded Sep 17, 2026	1-10	14 contacts →
	Exact match “Our mission is to provide organisations with a comprehensive, world class range of customised information security services and advice which will enable them to secure and protect…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Aegis 9	Exact match	Canberra, AustraliaHQ recorded Sep 17, 2026	11-50	12 contacts →
	Exact match “Aegis9 is an Australian owned consultancy that specialises in providing tailored security solutions for both public and private sector clients, based on their specific needs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Helix Services	Exact match	Canberra, AustraliaHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “At Helix, our mission is to strengthen Australia’s national security capability by delivering trusted people, intelligence-led vetting, and lean professional services to the…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Proton Security	Exact match	Bondi Junction, AustraliaHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “At Proton Security, we provide our clients with specialised advice and solutions unique to their business needs and risk profile.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Core42	Exact match	Perth, AustraliaHQ recorded Sep 17, 2026	1-10	9 contacts →
	Exact match “Security.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	NORTH	Exact match	AustraliaHQ recorded Sep 17, 2026	51-200	9 contacts →
	Exact match “north is about helping clients tailor their cyber security to the challenges that are specific to their business.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Crysp Consulting	Exact match	Southbank, AustraliaHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match “Crysp Consulting (Crysp) was founded by two professionals with collective experience of more than 35 years in the industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	STSC	Exact match	Canberra, AustraliaHQ recorded Sep 17, 2026	1-10	7 contacts →
	Exact match “STSC delivers Security, Technology, and Strategy Consulting services to commercial, corporate, and executive customers; a field in which we have been operating for almost fifteen…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	RED Cursor	Exact match	Sydney, AustraliaHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “Red Cursor was built on more than 20 years of real-world cybersecurity experience, helping protect over 800 organisations across Australia and beyond.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	The Pearson Corporation PTY LTD A Tesserent Company	Exact match	Canberra, AustraliaHQ recorded Sep 17, 2026	51-200	6 contacts →
	Exact match “The Pearson Corporation is a locally owned Canberra IT Consulting firm that has proven experience and a track record for delivering ICT and Cyber Security services to both the…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Trusted Impact PTY LTD	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	11-50	5 contacts →
	Exact match “With a singular focus on "Information Security", Trusted Impact prides itself on delivering demonstrable business outcomes by applying an independent perspective and by leveraging…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Reckon Security	Exact match	Adelaide, AustraliaHQ recorded Sep 17, 2026	1-10	5 contacts →
	Exact match “Reckon Security provides expertise in IT Security services to Australian government and corporate clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Matryx Consulting	Exact match	Melbourne, AustraliaHQ recorded Sep 17, 2026	1-10	5 contacts →
	Exact match “We're a close-knit team of passionate and compassionate security professionals who genuinely love helping others.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Patterned Security	Exact match	Sydney, AustraliaHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “At Patterned Security, we focus on building modern approaches to security strategy, architecture and design.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Five Eyes Consulting PTY LTD	Exact match	Canberra, AustraliaHQ recorded Sep 17, 2026	11-50	4 contacts →
	Exact match “Established in 2020, Five Eyes Consulting is a fast-growing Information Security and Technology consulting firm based in Canberra, Australia.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Redwood Security	Exact match	Brisbane City, AustraliaHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “Redwood Security is a young cyber security consulting company committed to doing more for its clients.” Recorded in the RevenueBase company graph · Sep 17, 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 “infrastructure hardening contractors”. 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 127 infrastructure hardening contractors based in Australia

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Infrastructure hardening contractors based in Australia at a glance

As of Sep 17, 2026

46.8%Verified-email coverage

6.2Average contacts per company

1-10Median size (employees)

19.7%Largest-city concentration · Sydney

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 127 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 “infrastructure hardening contractors” 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 371 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 September 17, 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.

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 “infrastructure hardening contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure hardening contractors are there based in Australia?

RevenueBase identified 127 company matches for infrastructure hardening contractors associated with Australia as of September 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?

Security Consulting Group PTY LTD SCG tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most infrastructure hardening contractors?

Sydney leads with 25 company records, followed by Melbourne (24) and Canberra (12).

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 371 professional contacts with verified work emails tracked across these 127 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 September 17, 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.