Company lists · Data refreshed September 2026

Top 25 IT security consulting companies based in Australia

Name: IT security consulting companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 819 companies tracked

RevenueBase identified 819 IT security consulting companies headquartered in Australia as of September 2026 and tracks 7,048 professional contacts across them, including 3,237 with verified work emails. Sydney is the largest hub.

This list covers IT security consulting 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 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

819Companies

7,048Contacts tracked

3,237Verified emails

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The 25 largest IT security consulting companies based in Australia

Ranked by team size

Top 25 of 819 IT security consulting companies 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 IT security consulting 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	Centorrino Technologies	Partial evidence	Coburg, AustraliaHQ checked Sep 21, 2026	201-500	352 contacts →
	Partial 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
2	Risk Associates - Emea & Asia	Partial evidence	Bella Vista, AustraliaHQ checked Sep 21, 2026	51-200	170 contacts →
	Partial evidence “Ensuring your business is handling cyber security risks effectively has never been more important.” Source: RevenueBase Database · checked Sep 21, 2026
3	Triskele Labs	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	123 contacts →
	Indirect evidence “Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: RevenueBase Database · checked Sep 21, 2026
4	Sekuro	Partial evidence	AustraliaHQ checked Sep 21, 2026	51-200	104 contacts →
	Partial 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
5	Ever Nimble	Strong evidence	West Perth, AustraliaHQ checked Sep 21, 2026	51-200	102 contacts →
	Strong evidence “We are your IT & Cyber Security partners.” Source: RevenueBase Database · checked Sep 21, 2026
6	ARA Security	Partial evidence	Kingsgrove, AustraliaHQ checked Sep 21, 2026	201-500	101 contacts →
	Partial evidence “ARA Security delivers turnkey security solutions to a number of industries across Australia.” Source: RevenueBase Database · checked Sep 21, 2026
7	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
8	Business Aspect	Indirect evidence	Toowong, AustraliaHQ checked Sep 21, 2026	51-200	75 contacts →
	Indirect evidence “At Business Aspect, our promise to our clients is to always look at things from a ‘fresh perspective’ and to ensure our engagement with you is based on a clear understanding of…” Source: RevenueBase Database · checked Sep 21, 2026
9	Skillfield	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	62 contacts →
	Partial 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
10	Ampion	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	501-1,000	61 contacts →
	Indirect evidence “Welcome to Ampion.” Source: RevenueBase Database · checked Sep 21, 2026
11	Ipsec PTY LTD	Partial evidence	Cremorne, AustraliaHQ checked Sep 21, 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 21, 2026
12	KODEZ	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	54 contacts →
	Partial evidence “At Kodez, we empower organisations of all sizes to deliver secure, high-impact digital outcomes through a blend of consulting, advisory, delivery, and managed services.” Source: RevenueBase Database · checked Sep 21, 2026
13	Ctrl Cyber	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	54 contacts →
	Indirect 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
14	Security Consulting Group PTY LTD SCG	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	52 contacts →
	Partial 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
15	Dimiya Tech	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	50 contacts →
	Partial evidence “DIMIYA Tech is a Melbourne, Australia based- global Cybersecurity and IT services provider supporting organizations that require secure, scalable, and high-performance technology…” Source: RevenueBase Database · checked Sep 21, 2026
16	Emerging IT	Indirect evidence	Mulgrave, AustraliaHQ checked Sep 21, 2026	51-200	46 contacts →
	Indirect evidence “Clarity in a complex world.” Source: RevenueBase Database · checked Sep 21, 2026
17	Vectra	Strong evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	51-200	42 contacts →
	Strong evidence “Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Seccom Global	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	41 contacts →
	Partial 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 21, 2026
19	Ionize	Strong evidence	Canberra, AustraliaHQ checked Sep 21, 2026	51-200	35 contacts →
	Strong evidence “When it comes to security there's no shortage of companies ready to tell you about your vulnerabilities.” Source: RevenueBase Database · checked Sep 21, 2026
20	Astralas	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	51-200	35 contacts →
	Indirect evidence “Good people solving important problems.” Source: RevenueBase Database · checked Sep 21, 2026
21	Netpoleon ANZ	Partial evidence	Docklands, AustraliaHQ checked Sep 21, 2026	501-1,000	34 contacts →
	Partial evidence “Originally founded in Netpoleon Group has become a leading provider of integrated security, networking solutions and value added services throughout the APAC region.” Source: RevenueBase Database · checked Sep 21, 2026
22	NSB Cyber	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	33 contacts →
	Partial evidence “NSB Cyber is an Australian-founded, privately owned cyber security company based in Sydney.” Source: RevenueBase Database · checked Sep 21, 2026
23	Mercury IT	Strong evidence	Arundel, AustraliaHQ checked Sep 21, 2026	51-200	33 contacts →
	Strong evidence “Mercury IT provides proactive, security‑focused IT services that help Australian businesses operate safely, efficiently, and with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
24	Cyberxcel	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	n/a	33 contacts →
	Partial evidence “Founded by Sohail Ershadi, a distinguished cybersecurity expert with over a decade of experience in the IT industry, CyberXcel has rapidly emerged as a leader in cybersecurity…” Source: RevenueBase Database · checked Sep 21, 2026
25	Division 5	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	11-50	32 contacts →
	Partial evidence “Division 5 is focused on building long-term relationships with our clients as their trusted cyber security advisor.” 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: IT security consulting 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 IT security consulting companies.
Partial evidence: Its own public description names part of IT security consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security consulting 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 25 of 819 IT security consulting companies based in Australia

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IT security consulting companies based in Australia at a glance

As of Sep 21, 2026

45.9%Verified-email coverage

8.6Average contacts per company

1-10Median size (employees)

22.2%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

549

11-50

207

51-200

201-500

501-1,000

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 819 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 IT security consulting 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 “IT security consulting 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 IT security consulting 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 IT security consulting 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, 3,237 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.

IT security consulting 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 IT security consulting 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 IT security consulting companies are there based in Australia?

RevenueBase identified 819 IT security consulting 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?

Centorrino Technologies, headquartered in Coburg, tops this list with the largest team on record.

Which city has the most IT security consulting companies?

Sydney leads with 182 headquartered companies, followed by Melbourne (161) and Brisbane (63).

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 3,237 verified decision-maker contacts tracked across these 819 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.