Company lists · Data refreshed September 2026

Top 25 Operational technology security companies based in Australia

Name: Operational technology security 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 67 companies tracked

RevenueBase identified 67 operational technology security companies headquartered in Australia as of September 2026 and tracks 615 professional contacts across them, including 199 with verified work emails and 27 with mobile numbers. Sydney is the largest hub.

This list covers operational technology security 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, its RevenueBase Smart Search rating, 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 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 5, 2026 86% judged on-target in blind review

67Companies

615Contacts tracked

199Verified emails

27Mobile numbers

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The 25 largest operational technology security companies based in Australia

Ranked by team size

Top 25 of 67 operational technology security companies based in Australia, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to operational technology security companies: 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	Intellect Systems	Strong evidence	Perth, AustraliaHQ checked Sep 5, 2026	51-200	84 contacts →
	Strong evidence “Intellect Systems is an end-to-end Operational Technology solution provider, specialising in Control Systems, Electrical Engineering, Communications, and Industrial IT…” Source: RevenueBase Database · checked Sep 5, 2026
2	Deploypartners	Indirect evidence	North Sydney, AustraliaHQ checked Sep 5, 2026	51-200	51 contacts →
	Indirect evidence “DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.” Source: RevenueBase Database · checked Sep 5, 2026
3	Secolve	Strong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	24 contacts →
	Strong evidence “Secolve is Australia's dedicated Operational Technology (OT) cybersecurity partner, protecting the critical infrastructure that powers everyday life across energy, water…” Source: RevenueBase Database · checked Sep 5, 2026
4	DULL	Strong evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	11-50	20 contacts →
	Strong evidence “Dull is an Australian cybersecurity company focused on providing Zero Trust Network Access solutions for operational technology (OT) devices, systems, and applications.” Source: RevenueBase Database · checked Sep 5, 2026
5	SIS Industrial Cyber Security	Partial evidence	South Yarra, AustraliaHQ checked Sep 5, 2026	11-50	18 contacts →
	Partial evidence “SIS Industrial Cyber Security protects what the world depends on but rarely sees.” Source: RevenueBase Database · checked Sep 5, 2026
6	Zynet PTY LTD	Partial evidence	Tullamarine, AustraliaHQ checked Sep 5, 2026	11-50	17 contacts →
	Partial evidence “Zynet is an Australian cyber security and IT services provider with more than 25 years of experience protecting organisations and keeping critical systems running.” Source: RevenueBase Database · checked Sep 5, 2026
7	Tier Sixteen	Strong evidence	West Perth, AustraliaHQ checked Sep 5, 2026	11-50	15 contacts →
	Strong evidence “As Industrial Automation and Operational Technology Experts, Tier Sixteen provides specialist engineering and automation services, delivering intelligent solutions and expert…” Source: RevenueBase Database · checked Sep 5, 2026
8	TEKKO	Strong evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	11-50	14 contacts →
	Strong evidence “At Tekko, we make managing Operational Technology simple so you can focus on running a safe and efficient mine.” Source: RevenueBase Database · checked Sep 5, 2026
9	Technow Australia	Partial evidence	Perth, AustraliaHQ checked Sep 5, 2026	1-10	12 contacts →
	Partial evidence “TechNow Australia is an AI-first Cyber Security Solutions provider.” Source: RevenueBase Database · checked Sep 5, 2026
10	IT First Responder	Indirect evidence	Castle Hill, AustraliaHQ checked Sep 5, 2026	11-50	11 contacts →
	Indirect evidence “First responders.” Source: RevenueBase Database · checked Sep 5, 2026
11	Oribus	Strong evidence	Hobart, AustraliaHQ checked Sep 5, 2026	11-50	10 contacts →
	Strong evidence “We are an Australian company specialising in Operational Technology delivery, development, and support including: Real Time SCADA, DMS, EMS, GMS Geospatial Information Systems…” Source: RevenueBase Database · checked Sep 5, 2026
12	Shadowsafe	Partial evidence	Norman Park, AustraliaHQ checked Sep 5, 2026	1-10	8 contacts →
	Partial evidence “ShadowSafe is a cyber security and IT services company based in Brisbane that protects Australian businesses from a wide range of digital threats including cyber attacks, data…” Source: RevenueBase Database · checked Sep 5, 2026
13	Security Impossible	Partial evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	1-10	8 contacts →
	Partial evidence “Cyber Range, SOC designing and implementation, risk and security assessment.” Source: RevenueBase Database · checked Sep 5, 2026
14	Riot Solutions	Partial evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	51-200	7 contacts →
	Partial evidence “RIOT is a local, national provider of managed cyber security services across both IT and OT environments that differentiates itself by offering customers access to experts in the…” Source: RevenueBase Database · checked Sep 5, 2026
15	Itsec Australia NEW Zealand	Indirect evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	201-500	5 contacts →
	Indirect evidence “ITSEC Australia & New Zealand helps organisations build resilience across IT, OT, and IoT environments.” Source: RevenueBase Database · checked Sep 5, 2026
16	Cyber Industrial Networks PTY LTD	Strong evidence	Mayfield West, AustraliaHQ checked Sep 5, 2026	1-10	4 contacts →
	Strong evidence “Cyber Industrial Networks (Ci-Net) is an Australian-owned OT/IT and industrial networking business specialising in the design, deployment and security of critical operational…” Source: RevenueBase Database · checked Sep 5, 2026
17	Goto Electrical PTY LTD	Strong evidence	North Lakes, AustraliaHQ checked Sep 5, 2026	1-10	4 contacts →
	Strong evidence “Goto Electrical Pty Ltd provides industry leading consultancy, design and integration services for operational technology to Critical Infrastructure clients.” Source: RevenueBase Database · checked Sep 5, 2026
18	Akson Australia	Indirect evidence	Ultimo, AustraliaHQ checked Sep 5, 2026	1-10	4 contacts →
	Indirect evidence “AKSON Australia is a Sydney-based IT services provider delivering innovative and reliable solutions tailored to meet the needs of businesses across diverse industries.” Source: RevenueBase Database · checked Sep 5, 2026
19	GA Systems Global Asset Systems	Partial evidence	Chatswood, AustraliaHQ checked Sep 5, 2026	11-50	4 contacts →
	Partial evidence “GA Systems is a ISO27001:2022 certified, Australian-owned and operated cyber security service provider delivering comprehensive, intelligence-driven protection across public and…” Source: RevenueBase Database · checked Sep 5, 2026
20	DGA Consulting	Strong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	3 contacts →
	Strong evidence “DGA Consulting is a specialist Operational Technology (OT) consulting company consisting of talented and experienced professionals who collaborate to solve client challenges in…” Source: RevenueBase Database · checked Sep 5, 2026
21	Utility Intelligence PTY LTD	Strong evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	1-10	3 contacts →
	Strong evidence “Operational Technology (OT) Consultants to the Utility sector; smart metering, communications for infrastructure, Supervisory Control and Data Acquisition (SCADA), industrial…” Source: RevenueBase Database · checked Sep 5, 2026
22	Feisty FOX Security PTY LTD	Partial evidence	Gunghalin, AustraliaHQ checked Sep 5, 2026	1-10	3 contacts →
	Partial evidence “Cyber security, done differently.” Source: RevenueBase Database · checked Sep 5, 2026
23	Availability System Engineering	Partial evidence	Perth, AustraliaHQ checked Sep 5, 2026	11-50	2 contacts →
	Partial evidence “Availability System Engineering is a discipline that focusses on the design, development, and maintenance for technologies that control, protect, and support business processes to…” Source: RevenueBase Database · checked Sep 5, 2026
24	Cyberguru	Partial evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	1-10	2 contacts →
	Partial evidence “Business Without Interruption™ Partnering with CyberGuru means you can benefit from our extensive experience, industry-leading tools and technologies, and our unwavering…” Source: RevenueBase Database · checked Sep 5, 2026
25	Hennsol Technologies	Indirect evidence	East Brisbane, AustraliaHQ checked Sep 5, 2026	1-10	1 contacts →
	Indirect evidence “OT and ICS cybersecurity for Australian critical infrastructure.” Source: RevenueBase Database · checked Sep 5, 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: operational technology security companies. 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 operational technology security companies.
Partial evidence: Its own public description names part of operational technology security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name operational technology security companies. 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 67 operational technology security companies based in Australia

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Operational technology security companies based in Australia at a glance

As of Sep 5, 2026

32.4%Verified-email coverage

4.4%Mobile-number coverage

9.2Average contacts per company

1-10Median size (employees)

17.9%Largest-city concentration · Sydney

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

1880–30

1131–60

061–90

090–180

0180+

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 operational technology security companies, 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 Australia whose own description of what they do matches “operational technology security companies”. 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 operational technology security companies), 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 operational technology security 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 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, 199 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.

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 operational technology security companies, 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 operational technology security companies are there based in Australia?

RevenueBase identified 67 operational technology security 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?

Intellect Systems, headquartered in Perth, tops this list with the largest team on record.

Which city has the most operational technology security companies?

Sydney leads with 12 headquartered companies, followed by Brisbane (11) and Melbourne (10).

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 199 verified decision-maker contacts tracked across these 67 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 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.