Company lists · Data refreshed September 2026

Top 25 Information security consulting firms based in Australia

RevenueBase identified 1,023 information security consulting firms headquartered in Australia as of September 2026 and tracks 8,472 professional contacts across them, including 3,651 with verified work emails and 451 with mobile numbers. Sydney is the largest hub.

This list covers information security consulting 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 3, 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 3, 2026 86% judged on-target in blind review
1,023Companies
8,472Contacts tracked
3,651Verified emails
451Mobile numbers
Unlock all 1,023 companies Free signup · no credit card · 500 free credits

The 25 largest information security consulting firms based in Australia

Ranked by team size
Top 25 of 1,023 information security consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names information security consulting 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
Centorrino TechnologiesPartial evidence
Coburg, AustraliaHQ checked Sep 3, 2026201-500349

“We are an Australian-owned, full-service ICT Solutions and Cyber Security provider with a locally based team of over 450 passionate Aussies.”

Source: company website · checked Sep 3, 2026
2
Triskele LabsIndirect evidence
Melbourne, AustraliaHQ checked Sep 3, 202651-200123

“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.”

Source: company website · checked Sep 3, 2026
3
Optic Security GroupPartial evidence
Brisbane Airport, AustraliaHQ checked Sep 3, 2026201-500122

“Optic Security Group is a leading provider of converged security risk management solutions serving the needs of corporate, enterprise, and government clients across Australia and…”

Source: company website · checked Sep 3, 2026
4
ARA SecurityPartial evidence
Kingsgrove, AustraliaHQ checked Sep 3, 2026201-500105

“ARA Security delivers turnkey security solutions to a number of industries across Australia.”

Source: company website · checked Sep 3, 2026
5
SekuroPartial evidence
AustraliaHQ checked Sep 3, 202651-200100

“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: company website · checked Sep 3, 2026
6
Ever NimblePartial evidence
West Perth, AustraliaHQ checked Sep 3, 202651-20098

“We are your IT & Cyber Security partners.”

Source: company website · checked Sep 3, 2026
7
Kaine Mathrick TechIndirect evidence
Port Melbourne, AustraliaHQ checked Sep 3, 202651-20091

“Australia’s cyber-first Managed Service Provider and true technology partner.”

Source: company website · checked Sep 3, 2026
8
Business AspectIndirect evidence
Toowong, AustraliaHQ checked Sep 3, 202651-20074

“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: company website · checked Sep 3, 2026
9
Northbridge SystemsPartial evidence
St Leonards, AustraliaHQ checked Sep 3, 202651-20070

“Northbridge is an Australian-owned cybersecurity services provider with more than 25 years’ experience delivering engineered, integrated and fully managed security services to…”

Source: company website · checked Sep 3, 2026
10
AmpionIndirect evidence
Melbourne, AustraliaHQ checked Sep 3, 2026501-1,00064

“Welcome to Ampion.”

Source: company website · checked Sep 3, 2026
11
Entersoft SecurityPartial evidence
Brisbane, AustraliaHQ checked Sep 3, 202651-20063

“Entersoft Security is an AI-enabled cybersecurity services firm helping modern enterprises build, ship, and operate secure digital products at scale.”

Source: company website · checked Sep 3, 2026
12
SkillfieldPartial evidence
Melbourne, AustraliaHQ checked Sep 3, 202651-20061

“Skillfield is a Melbourne-born Cyber Security, AI and big data solutions provider and professional services consultancy.”

Source: company website · checked Sep 3, 2026
13
Ipsec PTY LTDStrong evidence
Cremorne, AustraliaHQ checked Sep 3, 202611-5057

“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: company website · checked Sep 3, 2026
14
Ctrl CyberIndirect evidence
Melbourne, AustraliaHQ checked Sep 3, 202651-20056

“ctrl:cyber is an Australian owned and operated cybersecurity partner delivering tailored end-to-end solutions for industry-leading organisations.”

Source: company website · checked Sep 3, 2026
15
KODEZPartial evidence
Melbourne, AustraliaHQ checked Sep 3, 202611-5054

“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: company website · checked Sep 3, 2026
16
DeploypartnersIndirect evidence
North Sydney, AustraliaHQ checked Sep 3, 202651-20051

“DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.”

Source: company website · checked Sep 3, 2026
17Melbourne, AustraliaHQ checked Sep 3, 202651-20050

“SCG specialises in providing independent security and communications engineering, and security threat and risk consultancy services, to clients operating in challenging security…”

Source: company website · checked Sep 3, 2026
18
Dimiya TechIndirect evidence
Melbourne, AustraliaHQ checked Sep 3, 202651-20050

“DIMIYA Tech is a Melbourne, Australia based- global Cybersecurity and IT services provider supporting organizations that require secure, scalable, and high-performance technology…”

Source: company website · checked Sep 3, 2026
19
Emerging ITIndirect evidence
Mulgrave, AustraliaHQ checked Sep 3, 202651-20045

“Clarity in a complex world.”

Source: company website · checked Sep 3, 2026
20
Slipstream CyberIndirect evidence
Perth, AustraliaHQ checked Sep 3, 202611-5042

“Slipstream Cyber is a business of Interactive - Australia's leading technology solutions provider.”

Source: company website · checked Sep 3, 2026
21
VectraStrong evidence
Adelaide, AustraliaHQ checked Sep 3, 202651-20042

“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.”

Source: company website · checked Sep 3, 2026
22
Seccom GlobalPartial evidence
Sydney, AustraliaHQ checked Sep 3, 202611-5041

“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: company website · checked Sep 3, 2026
23
IPP Consulting PTY LTDPartial evidence
Melbourne, AustraliaHQ checked Sep 3, 202651-20037

SECURITY AND TECHNOLOGY EXPERTS ENGINEERING FOR A BETTER WORLD.”

Source: company website · checked Sep 3, 2026
24
Division 5Partial evidence
Brisbane, AustraliaHQ checked Sep 3, 202611-5036

“Division 5 is focused on building long-term relationships with our clients as their trusted cyber security advisor.”

Source: company website · checked Sep 3, 2026
25
AstralasIndirect evidence
Cremorne, AustraliaHQ checked Sep 3, 202651-20035

“Good people solving important problems.”

Source: company website · checked Sep 3, 2026

Showing 25 of 1,023 information security consulting firms based in Australia

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Information security consulting firms based in Australia at a glance

As of Sep 3, 2026
1-10Median size (employees)
SydneyLargest hub · 225 HQs
451Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
679
11-50
265
51-200
62
201-500
7
501-1,000
1
1,001-5,000
3

Verified emails by last verification

0–30
0
31–60
323
61–90
2,170
90–180
1,138
180+
20

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 information security consulting 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 “information security consulting 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 information security consulting 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, 3,651 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 3, 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.

Frequently asked

How many information security consulting firms are there based in Australia?

RevenueBase identified 1,023 information security consulting 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?

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

Which city has the most information security consulting firms?

Sydney leads with 225 headquartered companies, followed by Melbourne (190) and Brisbane (84).

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 3,651 verified decision-maker contacts tracked across these 1,023 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 3, 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.