Company lists · Data refreshed September 2026

Top 25 Managed security services companies based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 477 companies tracked

RevenueBase identified 477 managed security services companies headquartered in Australia as of September 2026 and tracks 5,154 professional contacts across them, including 1,995 with verified work emails and 277 with mobile numbers. Melbourne is the largest hub.

This list covers managed security services 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 5, 2026 86% judged on-target in blind review

477Companies

5,154Contacts tracked

1,995Verified emails

277Mobile numbers

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The 25 largest managed security services companies based in Australia

Ranked by team size

Top 25 of 477 managed security services companies based in Australia, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security services companies: 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.
#	Company	Headquarters	Employees	Contacts
1	Securitas AustraliaPartial evidence	Preston, AustraliaHQ checked Sep 5, 2026	10001+	228
	“We know how to offer the most effective security to our customers.” Source: company website · checked Sep 5, 2026
2	ADT Security AustraliaIndirect evidence	Rydalmere, AustraliaHQ checked Sep 5, 2026	501-1,000	178
	“For more than 130 years, we have stood alongside our community, protecting homes, families, businesses, and communities.” Source: company website · checked Sep 5, 2026
3	Triskele LabsIndirect evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	51-200	123
	“Triskele Labs is one of Australia’s fastest growing cybersecurity companies.” Source: company website · checked Sep 5, 2026
4	InfotrustStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	201-500	122
	“Infotrust (ITS) is Australia’s leading cyber security and managed technology services provider listed on the ASX.” Source: company website · checked Sep 5, 2026
5	Renew ITStrong evidence	Lane Cove West, AustraliaHQ checked Sep 5, 2026	51-200	115
	“Innovative Managed Services: Bridging Assets, Systems, and Security Welcome to Renew IT, your trusted partner in delivering comprehensive managed services, systems integration…” Source: company website · checked Sep 5, 2026
6	SekuroPartial evidence	AustraliaHQ checked Sep 5, 2026	51-200	104
	“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 5, 2026
7	Kaine Mathrick TechPartial evidence	Port Melbourne, AustraliaHQ checked Sep 5, 2026	51-200	93
	“Australia’s cyber-first Managed Service Provider and true technology partner.” Source: company website · checked Sep 5, 2026
8	Secure AgilityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	87
	“Secure Agility is a Australian-based technology partner specialising in secure managed IT services for NSW government, enterprise and mid-market organisations.” Source: company website · checked Sep 5, 2026
9	AG Security GroupPartial evidence	Adelaide, AustraliaHQ checked Sep 5, 2026	51-200	74
	“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: company website · checked Sep 5, 2026
10	StickmancyberIndirect evidence	Macquarie Park, AustraliaHQ checked Sep 5, 2026	51-200	72
	“At StickmanCyber we are on a mission to create a digital world that is safe for everyone.” Source: company website · checked Sep 5, 2026
11	Northbridge SystemsStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	70
	“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 5, 2026
12	Signal SecurityPartial evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	11-50	69
	“Australia's Multisite Security Specialist.” Source: company website · checked Sep 5, 2026
13	CPS Security ServicesPartial evidence	Epping, AustraliaHQ checked Sep 5, 2026	51-200	65
	“We are CPS Security Services, a 100% Australian-owned and operated company founded in 2006.” Source: company website · checked Sep 5, 2026
14	Ipsec PTY LTDPartial evidence	Cremorne, AustraliaHQ checked Sep 5, 2026	11-50	57
	“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 5, 2026
15	Premium SolutionsPartial evidence	Woollahra, AustraliaHQ checked Sep 5, 2026	51-200	52
	“Combining the very best personnel, processes and technology, Premium Solutions will redefine your expectations of the security industry.” Source: company website · checked Sep 5, 2026
16	Fortis SecurityPartial evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	51-200	51
	“Welcome to Fortis Security, founded in September of 2013, Fortis has grown year on year with customer support.” Source: company website · checked Sep 5, 2026
17	Oneteam IT PTY LTDIndirect evidence	Toowong, AustraliaHQ checked Sep 5, 2026	51-200	47
	“OneTeam IT - means you’ll be benefitting from over 60 years of collective experience in maximising return on IT investments.” Source: company website · checked Sep 5, 2026
18	Wipro SheldeIndirect evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	51-200	47
	“Our mission is to help our clients protect their assets, reputation, and customers from cyber threats, while also enabling them to embrace digital transformation and innovation…” Source: company website · checked Sep 5, 2026
19	Emerging ITIndirect evidence	Mulgrave, AustraliaHQ checked Sep 5, 2026	51-200	46
	“Clarity in a complex world.” Source: company website · checked Sep 5, 2026
20	VectraStrong evidence	Adelaide, AustraliaHQ checked Sep 5, 2026	51-200	42
	“Vectra, an Ensign company, is Australia’s trusted partner for security consulting, risk management, compliance, and managed services.” Source: company website · checked Sep 5, 2026
21	Seccom GlobalPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	41
	“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 5, 2026
22	FifteenStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	36
	“Delivering the next generation of managed cyber security, together.” Source: company website · checked Sep 5, 2026
23	IonizePartial evidence	Canberra, AustraliaHQ checked Sep 5, 2026	51-200	35
	“When it comes to security there's no shortage of companies ready to tell you about your vulnerabilities.” Source: company website · checked Sep 5, 2026
24	AstralasIndirect evidence	Cremorne, AustraliaHQ checked Sep 5, 2026	51-200	35
	“Good people solving important problems.” Source: company website · checked Sep 5, 2026
25	NSB CyberPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	33
	“NSB Cyber is an Australian-founded, privately owned cyber security company based in Sydney.” Source: company website · checked Sep 5, 2026

Showing 25 of 477 managed security services companies based in Australia

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Managed security services companies based in Australia at a glance

As of Sep 5, 2026

11-50Median size (employees)

MelbourneLargest hub · 78 HQs

277Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

213

11-50

180

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

1,861

31–60

127

61–90

90–180

180+

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 managed security services companies, 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 “managed security services companies”. 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 managed security services 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 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, 1,995 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 5, 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.

Managed security services companies by metro

Frequently asked

How many managed security services companies are there based in Australia?

RevenueBase identified 477 managed security services 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?

Securitas Australia, headquartered in Preston, tops this list with the largest team on record.

Which city has the most managed security services companies?

Melbourne leads with 78 headquartered companies, followed by Sydney (77) and Brisbane (26).

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 1,995 verified decision-maker contacts tracked across these 477 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 5, 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.