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, 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

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. Evidence rates how directly each company's own description names operational technology security 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	Intellect SystemsStrong evidence	Perth, AustraliaHQ checked Sep 5, 2026	51-200	84
	“Intellect Systems is an end-to-end Operational Technology solution provider, specialising in Control Systems, Electrical Engineering, Communications, and Industrial IT…” Source: company website · checked Sep 5, 2026
2	DeploypartnersIndirect evidence	North Sydney, AustraliaHQ checked Sep 5, 2026	51-200	51
	“DeployPartners offer unique values and benefits that enable our clients and partners to differentiate on customer service.” Source: company website · checked Sep 5, 2026
3	SecolveStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	11-50	24
	“Secolve is Australia's dedicated Operational Technology (OT) cybersecurity partner, protecting the critical infrastructure that powers everyday life across energy, water…” Source: company website · checked Sep 5, 2026
4	DULLStrong evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	11-50	20
	“Dull is an Australian cybersecurity company focused on providing Zero Trust Network Access solutions for operational technology (OT) devices, systems, and applications.” Source: company website · checked Sep 5, 2026
5	SIS Industrial Cyber SecurityPartial evidence	South Yarra, AustraliaHQ checked Sep 5, 2026	11-50	18
	“SIS Industrial Cyber Security protects what the world depends on but rarely sees.” Source: company website · checked Sep 5, 2026
6	Zynet PTY LTDPartial evidence	Tullamarine, AustraliaHQ checked Sep 5, 2026	11-50	17
	“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: company website · checked Sep 5, 2026
7	Tier SixteenStrong evidence	West Perth, AustraliaHQ checked Sep 5, 2026	11-50	15
	“As Industrial Automation and Operational Technology Experts, Tier Sixteen provides specialist engineering and automation services, delivering intelligent solutions and expert…” Source: company website · checked Sep 5, 2026
8	TEKKOStrong evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	11-50	14
	“At Tekko, we make managing Operational Technology simple so you can focus on running a safe and efficient mine.” Source: company website · checked Sep 5, 2026
9	Technow AustraliaPartial evidence	Perth, AustraliaHQ checked Sep 5, 2026	1-10	12
	“TechNow Australia is an AI-first Cyber Security Solutions provider.” Source: company website · checked Sep 5, 2026
10	IT First ResponderIndirect evidence	Castle Hill, AustraliaHQ checked Sep 5, 2026	11-50	11
	“First responders.” Source: company website · checked Sep 5, 2026
11	OribusStrong evidence	Hobart, AustraliaHQ checked Sep 5, 2026	11-50	10
	“We are an Australian company specialising in Operational Technology delivery, development, and support including: Real Time SCADA, DMS, EMS, GMS Geospatial Information Systems…” Source: company website · checked Sep 5, 2026
12	ShadowsafePartial evidence	Norman Park, AustraliaHQ checked Sep 5, 2026	1-10	8
	“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: company website · checked Sep 5, 2026
13	Security ImpossiblePartial evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	1-10	8
	“Cyber Range, SOC designing and implementation, risk and security assessment.” Source: company website · checked Sep 5, 2026
14	Riot SolutionsPartial evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	51-200	7
	“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: company website · checked Sep 5, 2026
15	Itsec Australia NEW ZealandIndirect evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	201-500	5
	“ITSEC Australia & New Zealand helps organisations build resilience across IT, OT, and IoT environments.” Source: company website · checked Sep 5, 2026
16	Cyber Industrial Networks PTY LTDStrong evidence	Mayfield West, AustraliaHQ checked Sep 5, 2026	1-10	4
	“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: company website · checked Sep 5, 2026
17	Goto Electrical PTY LTDStrong evidence	North Lakes, AustraliaHQ checked Sep 5, 2026	1-10	4
	“Goto Electrical Pty Ltd provides industry leading consultancy, design and integration services for operational technology to Critical Infrastructure clients.” Source: company website · checked Sep 5, 2026
18	Akson AustraliaIndirect evidence	Ultimo, AustraliaHQ checked Sep 5, 2026	1-10	4
	“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: company website · checked Sep 5, 2026
19	GA Systems Global Asset SystemsPartial evidence	Chatswood, AustraliaHQ checked Sep 5, 2026	11-50	4
	“GA Systems is a ISO27001:2022 certified, Australian-owned and operated cyber security service provider delivering comprehensive, intelligence-driven protection across public and…” Source: company website · checked Sep 5, 2026
20	DGA ConsultingStrong evidence	Sydney, AustraliaHQ checked Sep 5, 2026	1-10	3
	“DGA Consulting is a specialist Operational Technology (OT) consulting company consisting of talented and experienced professionals who collaborate to solve client challenges in…” Source: company website · checked Sep 5, 2026
21	Utility Intelligence PTY LTDStrong evidence	Melbourne, AustraliaHQ checked Sep 5, 2026	1-10	3
	“Operational Technology (OT) Consultants to the Utility sector; smart metering, communications for infrastructure, Supervisory Control and Data Acquisition (SCADA), industrial…” Source: company website · checked Sep 5, 2026
22	Feisty FOX Security PTY LTDPartial evidence	Gunghalin, AustraliaHQ checked Sep 5, 2026	1-10	3
	“Cyber security, done differently.” Source: company website · checked Sep 5, 2026
23	Availability System EngineeringPartial evidence	Perth, AustraliaHQ checked Sep 5, 2026	11-50	2
	“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: company website · checked Sep 5, 2026
24	CyberguruPartial evidence	Brisbane, AustraliaHQ checked Sep 5, 2026	1-10	2
	“Business Without Interruption™ Partnering with CyberGuru means you can benefit from our extensive experience, industry-leading tools and technologies, and our unwavering…” Source: company website · checked Sep 5, 2026
25	Hennsol TechnologiesIndirect evidence	East Brisbane, AustraliaHQ checked Sep 5, 2026	1-10	1
	“OT and ICS cybersecurity for Australian critical infrastructure.” Source: company website · checked Sep 5, 2026

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

1-10Median size (employees)

SydneyLargest hub · 12 HQs

27Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Verified emails by last verification

0–30

188

31–60

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 operational technology security 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 “operational technology security 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 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 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, 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

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 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.