Company lists · Data refreshed September 2026

Top 25 Government contract security companies based in Australia

RevenueBase identified 110 government contract security companies headquartered in Australia as of September 2026 and tracks 1,766 professional contacts across them, including 227 with verified work emails and 70 with mobile numbers. Melbourne is the largest hub.

This list covers government contract 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 3, 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 3, 2026 86% judged on-target in blind review
110Companies
1,766Contacts tracked
227Verified emails
70Mobile numbers
Unlock all 110 companies Free signup · no credit card · 500 free credits

The 25 largest government contract security companies based in Australia

Ranked by team size
Top 25 of 110 government contract security companies based in Australia, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names government contract 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.
#CompanyHeadquartersEmployeesContacts
1
SNP SecurityPartial evidence
West Ryde, AustraliaHQ checked Sep 3, 20261,001-5,000508

“Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.”

Source: company website · checked Sep 3, 2026
2
NPB Security AustraliaIndirect evidence
Perth, AustraliaHQ checked Sep 3, 20261,001-5,000191

“Static Guards Mobile Patrols Crowd Control”

Source: company website · checked Sep 3, 2026
3
ISECStrong evidence
Alexandria, AustraliaHQ checked Sep 3, 2026201-50085

“Established in 2001, ISEC is a leading provider of protective security, safety, risk management, and training services to the corporate, commercial and government sectors.”

Source: company website · checked Sep 3, 2026
4South Melbourne, AustraliaHQ checked Sep 3, 20261,001-5,00081

“National Protective Services is a leading professional security company, specialising in the provision of quality and tailored protective services and products to ensure optimum…”

Source: company website · checked Sep 3, 2026
5
AG Security GroupPartial evidence
Adelaide, AustraliaHQ checked Sep 3, 202651-20072

“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 3, 2026
6
CPS Security ServicesPartial evidence
Epping, AustraliaHQ checked Sep 3, 202651-20062

“We are CPS Security Services, a 100% Australian-owned and operated company founded in 2006.”

Source: company website · checked Sep 3, 2026
7
Exec SecurityPartial evidence
Melbourne, AustraliaHQ checked Sep 3, 2026501-1,00058

“Guarding Solutions | Armed Guards | 24/7 Grade A1 Monitoring | Mobile Patrols | Electronics | Advisory EXEC Security is an Australian owned, national company that specialises in…”

Source: company website · checked Sep 3, 2026
8Melbourne, AustraliaHQ checked Sep 3, 2026501-1,00054

“Australian owned Advent Security has been a leader in providing exceptional, value-for-money services to local, national and international clients in the public, private and…”

Source: company website · checked Sep 3, 2026
9Sydney, AustraliaHQ checked Sep 3, 2026201-50054

“Guardian Venue Management International is a proudly Australian-owned company, dedicated to delivering the highest standards of Security Solutions, Customized Protection, Traffic…”

Source: company website · checked Sep 3, 2026
10
Group 1 SecurityIndirect evidence
Sydney, AustraliaHQ checked Sep 3, 2026201-50025

“FreeCall 1800 GROUP 1.”

Source: company website · checked Sep 3, 2026
11
AMA SecurityStrong evidence
Adelaide, AustraliaHQ checked Sep 3, 202651-20021

“AMA Security is a provider of strategically tailored security solutions for commercial, business & industry, Government and Defence clients.”

Source: company website · checked Sep 3, 2026
12
Excell SecurityPartial evidence
Altona North, AustraliaHQ checked Sep 3, 202651-20015

“Excell Security is Melbourne's "one stop shop" for security, specialising in CCTV, alarms, monitoring and access control products and services, plus mobile patrols, security…”

Source: company website · checked Sep 3, 2026
13
Castle SecurityStrong evidence
Malaga, AustraliaHQ checked Sep 3, 202611-5014

“With clients in the Commercial, Government industrial, and residential marketplace, Australia-wide, Castle Security has the experience and knowledge to help find a solution for…”

Source: company website · checked Sep 3, 2026
14
Mondiaux SecurityPartial evidence
Fyshwick, AustraliaHQ checked Sep 3, 202651-20011

“Mondiaux Security, your resident 'Industrial Strength Security' provider.”

Source: company website · checked Sep 3, 2026
15
AMG SecurityStrong evidence
Point Cook, AustraliaHQ checked Sep 3, 202651-20011

Security Services Australia - Guards, Patrols, Events, Retail, Hospitality, Health Care, Government and Industry”

Source: company website · checked Sep 3, 2026
16
Classique SecurityPartial evidence
Perth, AustraliaHQ checked Sep 3, 202611-509

“Classique Security is Western Australia's most professional emerging security agency.”

Source: company website · checked Sep 3, 2026
17
Helex Pty. LTDIndirect evidence
Belmore, AustraliaHQ checked Sep 3, 202611-508

“Helex Pty.”

Source: company website · checked Sep 3, 2026
18
Barwon SecurityPartial evidence
Geelong, AustraliaHQ checked Sep 3, 202611-508

“At Barwon Security we pride ourselves on providing a high level of professional serviced to all our existing and new customers.”

Source: company website · checked Sep 3, 2026
19
Nepean Regional SecurityPartial evidence
Penrith, AustraliaHQ checked Sep 3, 202611-508

“Nepean Regional Security or NRS as some like to call us is one of the most awarded security companies in the state.”

Source: company website · checked Sep 3, 2026
20
Australis SecurityPartial evidence
Port Melbourne, AustraliaHQ checked Sep 3, 202611-507

“Australis Security has been an active small business within the Security Services Industry for many years and is experienced in delivering high quality security for commercial…”

Source: company website · checked Sep 3, 2026
21Newtown, AustraliaHQ checked Sep 3, 202651-2007

“As a local company our mission is to bring greater value to our clients by continuing innovation, embracing new technologies and techniques, and provide our clients with…”

Source: company website · checked Sep 3, 2026
22Wangara, AustraliaHQ checked Sep 3, 202611-506

Security Management Australasia (SMA) throughout the past 24 years have achieved high level experience in Large Commercial, Enterprise, Local and State Government, Mining…”

Source: company website · checked Sep 3, 2026
23
Genesis Security WA PTY LTDIndirect evidence
Jandakot, AustraliaHQ checked Sep 3, 202651-2005

“Service is Everything.”

Source: company website · checked Sep 3, 2026
24Lavington, AustraliaHQ checked Sep 3, 202651-2005

“Albury based security company”

Source: company website · checked Sep 3, 2026
25
3m Security PTY LTDPartial evidence
Fairfield West, AustraliaHQ checked Sep 3, 202611-504

“3M Security Pty Ltd, provides 24x7 wide range of security services we are specialized in uniformed guards, corporate security, high profile luxury retail security, alarm response…”

Source: company website · checked Sep 3, 2026

Showing 25 of 110 government contract security companies based in Australia

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Government contract security companies based in Australia at a glance

As of Sep 3, 2026
11-50Median size (employees)
MelbourneLargest hub · 13 HQs
70Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
19
11-50
40
51-200
31
201-500
8
501-1,000
3
1,001-5,000
7

Verified emails by last verification

0–30
0
31–60
21
61–90
125
90–180
81
180+
0

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 government contract 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 “government contract 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 government contract 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, 227 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 3, 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 government contract security companies are there based in Australia?

RevenueBase identified 110 government contract 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?

SNP Security, headquartered in West Ryde, tops this list with the largest team on record.

Which city has the most government contract security companies?

Melbourne leads with 13 headquartered companies, followed by Sydney (9) and Brisbane (7).

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 227 verified decision-maker contacts tracked across these 110 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 3, 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.