Company lists · Data refreshed September 2026

Top 24 Critical infrastructure protection companies based in Australia

Name: Critical infrastructure protection companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 266 companies tracked

RevenueBase identified 266 critical infrastructure protection companies headquartered in Australia as of September 2026 and tracks 4,846 professional contacts across them, including 1,487 with verified work emails. Melbourne is the largest hub.

This list covers critical infrastructure protection companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

266Companies

4,846Contacts tracked

1,487Verified emails

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The 24 largest critical infrastructure protection companies based in Australia

Ranked by team size

Top 24 of 266 critical infrastructure protection companies based in Australia, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure protection companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Wilson Security	Indirect evidence	Essendon Fields, AustraliaHQ checked Sep 19, 2026	5,001-10,000	1,813 contacts →
	Indirect evidence “At Wilson Security, we are committed to building a safer future for everyone.” Source: RevenueBase Database · checked Sep 19, 2026
2	SNP Security	Indirect evidence	West Ryde, AustraliaHQ checked Sep 19, 2026	1,001-5,000	510 contacts →
	Indirect evidence “Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.” Source: RevenueBase Database · checked Sep 19, 2026
3	ADT Security Australia	Partial evidence	Rydalmere, AustraliaHQ checked Sep 19, 2026	501-1,000	178 contacts →
	Partial evidence “For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Source: RevenueBase Database · checked Sep 19, 2026
4	Triskele Labs	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	123 contacts →
	Indirect evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 19, 2026
5	ARA Security	Indirect evidence	Kingsgrove, AustraliaHQ checked Sep 19, 2026	201-500	101 contacts →
	Indirect evidence “ARA Security delivers turnkey security solutions to a number of industries across Australia.” Source: RevenueBase Database · checked Sep 19, 2026
6	Sturdie	Indirect evidence	North Plympton, AustraliaHQ checked Sep 19, 2026	51-200	63 contacts →
	Indirect evidence “Established in 2006, Sturdie has grown to become one of the most respected providers of high-quality electrical services and security technology in Australia and New Zealand.” Source: RevenueBase Database · checked Sep 19, 2026
7	Exec Security	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	501-1,000	59 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 19, 2026
8	Ipsec PTY LTD	Partial evidence	Cremorne, AustraliaHQ checked Sep 19, 2026	11-50	57 contacts →
	Partial evidence “IPSec are specialists in information asset and cyber protection; security experts who know how to mitigate cyber risk by assisting in the protection of valuable intelligence…” Source: RevenueBase Database · checked Sep 19, 2026
9	Security Consulting Group PTY LTD SCG	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	52 contacts →
	Indirect evidence “SCG specialises in providing independent security and communications engineering, and security threat and risk consultancy services, to clients operating in challenging security…” Source: RevenueBase Database · checked Sep 19, 2026
10	Vibrant Services	Indirect evidence	Coburg North, AustraliaHQ checked Sep 19, 2026	201-500	51 contacts →
	Indirect evidence “Welcome to Vibrant Services.” Source: RevenueBase Database · checked Sep 19, 2026
11	Securcom PTY LTD	Indirect evidence	Brendale, AustraliaHQ checked Sep 19, 2026	51-200	51 contacts →
	Indirect evidence “Established in the year Securcom has 20 years’ experience as a specialist security solution provider.” Source: RevenueBase Database · checked Sep 19, 2026
12	Vectra	Indirect evidence	Adelaide, AustraliaHQ checked Sep 19, 2026	51-200	42 contacts →
	Indirect evidence “Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: RevenueBase Database · checked Sep 19, 2026
13	Seccom Global	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	41 contacts →
	Indirect evidence “Seccom Global - The Cyber Security Company Providing excellence in service to educate, connect and protect your business Founded in 2003, Seccom Global is recognised as a leader…” Source: RevenueBase Database · checked Sep 19, 2026
14	IPP Consulting PTY LTD	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “SECURITY AND TECHNOLOGY EXPERTS ENGINEERING FOR A BETTER WORLD.” Source: RevenueBase Database · checked Sep 19, 2026
15	H3c Plus	Indirect evidence	Bankstown, AustraliaHQ checked Sep 19, 2026	51-200	34 contacts →
	Indirect evidence “The Team at H3C Plus have been providing Security Solutions for 10 years and have over 50 years of combined expertise in the Electronic Security Industry.” Source: RevenueBase Database · checked Sep 19, 2026
16	Excite Cyber	Indirect evidence	North Sydney, AustraliaHQ checked Sep 19, 2026	11-50	31 contacts →
	Indirect evidence “At Excite Cyber, we envision a world where businesses can fearlessly embrace technology and leverage the best cyber expertise for robust, outcome-focused solutions.” Source: RevenueBase Database · checked Sep 19, 2026
17	Opusv Tech Group	Partial evidence	Oakleigh, AustraliaHQ checked Sep 19, 2026	11-50	28 contacts →
	Partial evidence “OpusV has been operating in the infrastructure design and support space for over 20 years.” Source: RevenueBase Database · checked Sep 19, 2026
18	AVA Group	Indirect evidence	Mulgrave, AustraliaHQ checked Sep 19, 2026	51-200	28 contacts →
	Indirect evidence “Ava Group is a market leader of risk management services and technologies, trusted by some of the most security conscious commercial, industrial, military and government clients…” Source: RevenueBase Database · checked Sep 19, 2026
19	Fortian	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	11-50	25 contacts →
	Indirect evidence “Fortian is a leading Australian company specialising in cyber security, privacy, and technology risk management.” Source: RevenueBase Database · checked Sep 19, 2026
20	Omen Security PTY LTD	Strong evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	20 contacts →
	Strong evidence “OMEN provides specialist security solutions across a broad range of industries, including aviation and other critical infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
21	Accesstel	Partial evidence	Yarraville, AustraliaHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “accesstel is Australia’s leading provider of actionable insights for distributed networks of critical assets.” Source: RevenueBase Database · checked Sep 19, 2026
22	Cybersecon	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “CyberSecOn is an Information security company with a presence in Australia, USA and India.” Source: RevenueBase Database · checked Sep 19, 2026
23	Security Centric	Indirect evidence	Sydney Cbd, AustraliaHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Security Centric is a boutique specialist information security consulting and services organisation.” Source: RevenueBase Database · checked Sep 19, 2026
24	Zynet PTY LTD	Strong evidence	Tullamarine, AustraliaHQ checked Sep 19, 2026	11-50	17 contacts →
	Strong evidence “Zynet is an Australian cyber security and IT services provider with more than 25 years of experience protecting organisations and keeping critical systems running.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: critical infrastructure protection companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names critical infrastructure protection companies.
Partial evidence: Its own public description names part of critical infrastructure protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure protection companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 24 of 266 critical infrastructure protection companies based in Australia

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Critical infrastructure protection companies based in Australia at a glance

As of Sep 19, 2026

30.7%Verified-email coverage

18.2Average contacts per company

1-10Median size (employees)

18.8%Largest-city concentration · Melbourne

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

145

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 266 companies.

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 critical infrastructure protection companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “critical infrastructure protection companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names critical infrastructure protection companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among critical infrastructure protection companies, 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 its RevenueBase Smart Search 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, 1,487 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 19, 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.

Critical infrastructure protection companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names critical infrastructure protection companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many critical infrastructure protection companies are there based in Australia?

RevenueBase identified 266 critical infrastructure protection companies 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?

Wilson Security, headquartered in Essendon Fields, tops this list with the largest team on record.

Which city has the most critical infrastructure protection companies?

Melbourne leads with 50 headquartered companies, followed by Sydney (47) and Brisbane (25).

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 1,487 verified decision-maker contacts tracked across these 266 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 19, 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 Smart Search, 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.