Company lists · Data refreshed September 2026

Top 25 Managed security service providers based in Sydney, Australia

Name: Managed security service providers based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 155 companies tracked

RevenueBase identified 155 managed security service providers headquartered in Sydney, Australia as of September 2026 and tracks 1,227 professional contacts across them, including 539 with verified work emails. Melbourne is the largest hub.

This list covers managed security service providers 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, 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

155Companies

1,227Contacts tracked

539Verified emails

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The 25 largest managed security service providers based in Sydney, Australia

Ranked by team size

Top 25 of 155 managed security service providers based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security service providers: 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	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
2	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
3	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
4	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
5	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
6	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
7	CSO GroupPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	31
	“CSO Group provides ICT security services and solutions to protect Australian businesses from advanced cyber threats.” Source: company website · checked Sep 5, 2026
8	NUEVAIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	51-200	30
	“At Nueva, we aim to create a safer digital environment by providing innovative and customised cybersecurity solutions for our clients.” Source: company website · checked Sep 5, 2026
9	Datcom CloudIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	26
	“Minimise the risk of a cybersecurity incident.” Source: company website · checked Sep 5, 2026
10	GridwareIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	25
	“For most organisations in Australia, a data breach can be more than a PR disaster, it could be the final chapter.” Source: company website · checked Sep 5, 2026
11	ThreatdefencePartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	24
	“ThreatDefence provides innovative Security Operations and cyber defence solutions to MSPs and Enterprises.” Source: company website · checked Sep 5, 2026
12	Silentgrid SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	23
	“SilentGrid is an offensive security consultancy with a focus on adversary simulation and penetration testing.” Source: company website · checked Sep 5, 2026
13	Empire TechnologiesIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	21
	“At Empire Technologies, our unwavering dedication to delivering technology solutions can help you drive business success.” Source: company website · checked Sep 5, 2026
14	RazilioPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	19
	“Razilio is a Sydney, Australia-based boutique cybersecurity consultancy that simplifies the management of cyber risk for businesses of all sizes.” Source: company website · checked Sep 5, 2026
15	Threat IntelligenceIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	19
	“Threat Intelligence is different.” Source: company website · checked Sep 5, 2026
16	NCC Group ApacIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1,001-5,000	18
	“NCC Group exists to make the world safer and more secure.” Source: company website · checked Sep 5, 2026
17	Ciso OnlinePartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	17
	“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: company website · checked Sep 5, 2026
18	Intrix Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	16
	“Intrix Cyber Security protect businesses with our Information Security Services.” Source: company website · checked Sep 5, 2026
19	Skylight Cyber SecurityPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	15
	“Skylight is a boutique cyber security practice providing high-end services to the modern enterprise.” Source: company website · checked Sep 5, 2026
20	CybersuiteIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	15
	“cyberSuite is your partner in cyber.” Source: company website · checked Sep 5, 2026
21	Mercury Information Security ServicesPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	14
	“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: company website · checked Sep 5, 2026
22	MorrisecPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	14
	“Morrisec provides tailored security strategies and services that align with each company’s specific threat landscape, risk profile, and strategic goals.” Source: company website · checked Sep 5, 2026
23	Foit GroupPartial evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	13
	“FOIT Group is an Australian owned and operated Managed Service Provider offering enterprise-grade technology solutions, support, cybersecurity, cloud and advisory services.” Source: company website · checked Sep 5, 2026
24	ParabellumIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	13
	“At Parabellum, we help organisations see clearly and act confidently in a complex digital world.” Source: company website · checked Sep 5, 2026
25	ZirilioIndirect evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	10
	“With ZIRILIO on your side, the digital world just became safer.” Source: company website · checked Sep 5, 2026

Showing 25 of 155 managed security service providers based in Sydney, Australia

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Managed security service providers based in Sydney, Australia at a glance

As of Sep 5, 2026

1-10Median size (employees)

MelbourneLargest hub · 156 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole Australia list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 155 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 managed security service providers, 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 Sydney, Australia whose own description of what they do matches “managed security service providers”. 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 service providers, 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 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, 539 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 service providers by metro in Australia

Managed security service providers in Melbourne156
Managed security service providers in Sydney155
Managed security service providers in Brisbane62
Managed security service providers in Canberra37
Managed security service providers in Perth35

Frequently asked

How many managed security service providers are there based in Sydney, Australia?

RevenueBase identified 155 managed security service providers 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?

Infotrust, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most managed security service providers?

Melbourne leads with 156 headquartered companies, followed by Sydney (155) and Brisbane (62).

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 539 verified decision-maker contacts tracked across these 155 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.