Company lists · Data refreshed September 2026

Top 25 Cybersecurity contractors based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,064 companies tracked

RevenueBase identified 1,064 cybersecurity contractors headquartered in Australia as of September 2026 and tracks 14,297 professional contacts across them, including 5,561 with verified work emails. Sydney is the largest hub.

This list covers cybersecurity contractors 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 21, 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 21, 2026 86% judged on-target in blind review

1,064Companies

14,297Contacts tracked

5,561Verified emails

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The 25 largest cybersecurity contractors based in Australia

Ranked by team size

Top 25 of 1,064 cybersecurity contractors based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity contractors: 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	Leidos Australia	Indirect evidence	Scoresby, AustraliaHQ checked Sep 21, 2026	1,001-5,000	969 contacts →
	Indirect evidence “Leidos is a Fortune 500® innovation company working to solve the world’s toughest challenges in government, intelligence, defence, aviation, border protection and health markets.” Source: RevenueBase Database · checked Sep 21, 2026
2	Centorrino Technologies	Indirect evidence	Coburg, AustraliaHQ checked Sep 21, 2026	201-500	352 contacts →
	Indirect evidence “We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.” Source: RevenueBase Database · checked Sep 21, 2026
3	ADT Security Australia	Indirect evidence	Rydalmere, AustraliaHQ checked Sep 21, 2026	501-1,000	178 contacts →
	Indirect evidence “For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Source: RevenueBase Database · checked Sep 21, 2026
4	Risk Associates - Emea & Asia	Indirect evidence	Bella Vista, AustraliaHQ checked Sep 21, 2026	51-200	170 contacts →
	Indirect evidence “Ensuring your business is handling cyber security risks effectively has never been more important.” Source: RevenueBase Database · checked Sep 21, 2026
5	Triskele Labs	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	123 contacts →
	Partial evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 21, 2026
6	Infotrust	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	122 contacts →
	Indirect evidence “Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Source: RevenueBase Database · checked Sep 21, 2026
7	Renew IT	Indirect evidence	Lane Cove West, AustraliaHQ checked Sep 21, 2026	51-200	115 contacts →
	Indirect evidence “Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Source: RevenueBase Database · checked Sep 21, 2026
8	NEW ERA Technology AU	Indirect evidence	Mascot, AustraliaHQ checked Sep 21, 2026	501-1,000	111 contacts →
	Indirect evidence “New Era delivers Technology Solutions that securely connect people, places, and information in a rapidly changing digital world.” Source: RevenueBase Database · checked Sep 21, 2026
9	Sekuro	Indirect evidence	AustraliaHQ checked Sep 21, 2026	51-200	104 contacts →
	Indirect evidence “Sekuro is a cyber security and digital resiliency solutions provider that helps CIOs and CISOs take a strategic approach to cyber security risk mitigation and building business…” Source: RevenueBase Database · checked Sep 21, 2026
10	Ever Nimble	Indirect evidence	West Perth, AustraliaHQ checked Sep 21, 2026	51-200	102 contacts →
	Indirect evidence “We are your IT & Cyber Security partners.” Source: RevenueBase Database · checked Sep 21, 2026
11	ARA Security	Indirect evidence	Kingsgrove, AustraliaHQ checked Sep 21, 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 21, 2026
12	Kaine Mathrick Tech	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	93 contacts →
	Indirect evidence “Australia’s cyber-first Managed Service Provider and true technology partner.” Source: RevenueBase Database · checked Sep 21, 2026
13	Informatech PTY LTD	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	51-200	88 contacts →
	Indirect evidence “Informatech is a veteran led business and specialises in ICT within Defence.” Source: RevenueBase Database · checked Sep 21, 2026
14	Secure Agility	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	87 contacts →
	Indirect evidence “Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Source: RevenueBase Database · checked Sep 21, 2026
15	AG Security Group	Indirect evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	51-200	74 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
16	Stickmancyber	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 21, 2026	51-200	72 contacts →
	Indirect evidence “At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” Source: RevenueBase Database · checked Sep 21, 2026
17	Northbridge Systems	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	70 contacts →
	Partial evidence “Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…” Source: RevenueBase Database · checked Sep 21, 2026
18	Epe. Trusted To Protect	Indirect evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	51-200	62 contacts →
	Indirect evidence “We exclusively represent global leaders in CIED technologies, Force Protection ECM, Counter Drone and All Hazards Management, supporting Defence, Police, First Responders and…” Source: RevenueBase Database · checked Sep 21, 2026
19	Skillfield	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	62 contacts →
	Indirect evidence “Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
20	3columns	Indirect evidence	502, AustraliaHQ checked Sep 21, 2026	51-200	61 contacts →
	Indirect evidence “Discover 3Columns, your premier destination for cutting-edge cyber security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	LKA Group	Indirect evidence	Carlton, AustraliaHQ checked Sep 21, 2026	51-200	59 contacts →
	Indirect evidence “For decades, LKA Group has provided the highest level of service to all clients, from small business to multinational corporations and governments.” Source: RevenueBase Database · checked Sep 21, 2026
22	Ipsec PTY LTD	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	11-50	57 contacts →
	Indirect 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 21, 2026
23	Ctrl Cyber	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	54 contacts →
	Partial evidence “ctrl:cyber is an Australian owned and operated cybersecurity partner delivering tailored end-to-end solutions for industry-leading organisations.” Source: RevenueBase Database · checked Sep 21, 2026
24	Security Consulting Group PTY LTD SCG	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 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 21, 2026
25	Deploypartners	Indirect evidence	North Sydney, AustraliaHQ checked Sep 21, 2026	51-200	51 contacts →
	Indirect evidence “DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.” Source: RevenueBase Database · checked Sep 21, 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: cybersecurity contractors. 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 cybersecurity contractors.
Partial evidence: Its own public description names part of cybersecurity contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity contractors. 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 25 of 1,064 cybersecurity contractors based in Australia

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Cybersecurity contractors based in Australia at a glance

As of Sep 21, 2026

38.9%Verified-email coverage

13.4Average contacts per company

1-10Median size (employees)

19.7%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

632

11-50

321

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,064 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 cybersecurity contractors, 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 “cybersecurity contractors”. 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 cybersecurity contractors), 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 cybersecurity contractors, 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, 5,561 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 21, 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.

Cybersecurity contractors 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 cybersecurity contractors, 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 cybersecurity contractors are there based in Australia?

RevenueBase identified 1,064 cybersecurity contractors 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?

Leidos Australia, headquartered in Scoresby, tops this list with the largest team on record.

Which city has the most cybersecurity contractors?

Sydney leads with 210 headquartered companies, followed by Melbourne (187) and Brisbane (83).

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 5,561 verified decision-maker contacts tracked across these 1,064 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 21, 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.