Company lists · Data refreshed September 2026

Top 10 Industrial control system security contractors based in Sydney, Australia

Name: Industrial control system security contractors based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 28 companies tracked

RevenueBase identified 28 industrial control system security contractors headquartered in Sydney, Australia as of September 2026 and tracks 141 professional contacts across them, including 51 with verified work emails. Across Australia, Melbourne is the largest hub for this category (35 companies); Sydney follows with 28.

This list covers industrial control system security contractors 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 28, 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 28, 2026 86% judged on-target in blind review

28Companies

141Contacts tracked

51Verified emails

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The 10 largest industrial control system security contractors based in Sydney, Australia

Ranked by team size

Top 10 of 28 industrial control system security contractors based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to industrial control system security contractors: 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	Seccom Global	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 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 28, 2026
2	Morrisec	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 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 28, 2026
3	Cyberpulse	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “CyberPulse partners with organisations to operationalise security across the full threat lifecycle, from governance and compliance through to detection, response, and continuous…” Source: RevenueBase Database · checked Sep 28, 2026
4	Nsaa Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Who are NSAA Security NSAA Security team have years of experience working within highly demanding information security environments.” Source: RevenueBase Database · checked Sep 28, 2026
5	Keystone Controls	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	51-200	3 contacts →
	Strong evidence “Keystone Controls is an industrial control systems specialist and a full-service expert partner for select leaders in power and mining, building and supporting industrial…” Source: RevenueBase Database · checked Sep 28, 2026
6	Industry Risk	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “RAISING AUSTRALIAN SECURITY AND BUSINESS RESILIENCE TO NEW HEIGHTS.” Source: RevenueBase Database · checked Sep 28, 2026
7	Grc4	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “GRC4 specialises in a range of services designed to fortify your business and streamline your operations.” Source: RevenueBase Database · checked Sep 28, 2026
8	Aurian Security	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Aurian is a leading provider of information security services in Australia.” Source: RevenueBase Database · checked Sep 28, 2026
9	Xigsaw	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “XIGSAW IS SOLVING THE IT SECURITY PUZZLE Businesses buy on advise and desire the best outcome.” Source: RevenueBase Database · checked Sep 28, 2026
10	Viridian Security Management	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Independent Security and Risk Consultancy.” Source: RevenueBase Database · checked Sep 28, 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: industrial control system security contractors. 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 industrial control system security contractors.
Partial evidence: Its own public description names part of industrial control system security contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial control system security contractors. 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 10 of 28 industrial control system security contractors based in Sydney, Australia

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Industrial control system security contractors based in Sydney, Australia at a glance

As of Sep 28, 2026

36.2%Verified-email coverage

5.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 28 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 industrial control system security contractors, 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 “industrial control system security contractors”. 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 industrial control system security contractors), 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 industrial control system security contractors, 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, 51 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 28, 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.

Industrial control system security contractors by metro in Australia

Industrial control system security contractors in Melbourne35

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 industrial control system security contractors, 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 industrial control system security contractors are there based in Sydney, Australia?

RevenueBase identified 28 industrial control system security contractors 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?

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

Which city in Australia has the most industrial control system security contractors?

Melbourne leads Australia with 35 headquartered companies, followed by Sydney (28) and Brisbane (11).

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 51 verified decision-maker contacts tracked across these 28 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 28, 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.