Company lists · Data refreshed September 2026

Top 25 IT security managed services based in Sydney, Australia

Name: IT security managed services based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 132 companies tracked

RevenueBase identified 132 IT security managed services headquartered in Sydney, Australia as of September 2026 and tracks 1,246 professional contacts across them, including 725 with verified work emails. Sydney is the largest hub.

This list covers IT security managed services headquartered in Sydney, 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

132Companies

1,246Contacts tracked

725Verified emails

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The 25 largest IT security managed services based in Sydney, Australia

Ranked by team size

Top 25 of 132 IT security managed services based in Sydney, 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 managed services: 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	Virtual IT Group Vitg	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	167 contacts →
	Strong evidence “Virtual IT Group is Australia & New Zealand's leading managed IT cybersecurity provider.” Source: RevenueBase Database · checked Sep 21, 2026
2	Infotrust	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	122 contacts →
	Strong 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
3	Experteq	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	90 contacts →
	Partial evidence “With a proven track record of 30 years, experteq is a proudly Australian IT company that combines the strengths of two storied brands – TAS and Experteq – to deliver outstanding…” Source: RevenueBase Database · checked Sep 21, 2026
4	Secure Agility	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	87 contacts →
	Strong 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
5	Northbridge Systems	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	70 contacts →
	Strong 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
6	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
7	Fifteen	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	36 contacts →
	Strong evidence “Delivering the next generation of managed cyber security, together.” Source: RevenueBase Database · checked Sep 21, 2026
8	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
9	CSO Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
10	Datcom Cloud	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Minimise the risk of a cybersecurity incident.” Source: RevenueBase Database · checked Sep 21, 2026
11	Vectec	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “VECTEC is an Australian technology consultancy, integrator and managed service partner with operations in Sydney, Melbourne & Brisbane.” Source: RevenueBase Database · checked Sep 21, 2026
12	Threatdefence	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “ThreatDefence provides innovative Security Operations and cyber defence solutions to MSPs and Enterprises.” Source: RevenueBase Database · checked Sep 21, 2026
13	IT Logic PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	23 contacts →
	Strong evidence “IT Logic provides Managed Services and procurement to clients in any industry pre-dominantly in the small to medium size business space.” Source: RevenueBase Database · checked Sep 21, 2026
14	Fooforce PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	19 contacts →
	Strong evidence “FooForce is a full-service strategic IT consultancy that plans, customises and manages clients’ IT needs.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ciso Online	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “CISO Online™ specialises in Cyber Security, Governance, Risk & Compliance (GRC), and Secure AI adoption for government agencies, large enterprises, and SMBs across Australia and…” Source: RevenueBase Database · checked Sep 21, 2026
16	Intrix Cyber Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	16 contacts →
	Partial evidence “Intrix Cyber Security protect businesses with our Information Security Services.” Source: RevenueBase Database · checked Sep 21, 2026
17	Mercury Information Security Services	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	14 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
18	Morrisec	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Source: RevenueBase Database · checked Sep 21, 2026
19	Foit Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “FOIT Group is an Australian owned and operated Managed Service Provider offering enterprise-grade technology solutions, support, cybersecurity, cloud and advisory services.” Source: RevenueBase Database · checked Sep 21, 2026
20	Innessco	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “Innessco Empowering Law Firms with Streamlined IT, Allowing You to Focus on Your Clients.” Source: RevenueBase Database · checked Sep 21, 2026
21	Itglobal Networks	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	12 contacts →
	Strong evidence “itGlobal provides secure, efficient and effective IT management, enabling you to securely collaborate within your workplace.” Source: RevenueBase Database · checked Sep 21, 2026
22	Pyramid Global Technologies	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	12 contacts →
	Strong evidence “Pyramid Global Technologies is a highly regarded Managed IT Service Provider offers value-driven solutions and a range of IT support services.” Source: RevenueBase Database · checked Sep 21, 2026
23	Assertiv	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Assertiv is a Security Services company based in Sydney, Australia with offices in Melbourne, Wellington (New Zealand), and Singapore.” Source: RevenueBase Database · checked Sep 21, 2026
24	Zirilio	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “With ZIRILIO on your side, the digital world just became safer.” Source: RevenueBase Database · checked Sep 21, 2026
25	Volkis	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Volkis is a dedicated information security consultancy that provides penetration testing, security assessment, red team, GRC, and training services at its core.” 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 managed services. 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 managed services.
Partial evidence: Its own public description names part of IT security managed services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security managed services. 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 132 IT security managed services based in Sydney, Australia

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IT security managed services based in Sydney, Australia at a glance

As of Sep 21, 2026

58.2%Verified-email coverage

9.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 132 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 managed services, 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 Sydney, Australia whose own description of what they do matches “IT security managed services”. 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 managed services), 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 managed services, and records with no verified work email. Companies headquartered outside Sydney 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, 725 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 managed services by metro in Australia

IT security managed services in Sydney132
IT security managed services in Melbourne127
IT security managed services in Brisbane58
IT security managed services in Perth38

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 managed services, 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 managed services are there based in Sydney, Australia?

RevenueBase identified 132 IT security managed services headquartered in Sydney, 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?

Virtual IT Group Vitg, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most IT security managed services?

Sydney leads with 132 headquartered companies, followed by Melbourne (127) and Brisbane (58).

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 725 verified decision-maker contacts tracked across these 132 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.