Company lists · Data refreshed September 2026

Top 25 Government contract security companies based in Australia

Name: Government contract security companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 110 companies tracked

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, its RevenueBase Smart Search rating, 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 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 3, 2026 86% judged on-target in blind review

110Companies

1,766Contacts tracked

227Verified emails

70Mobile numbers

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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. RevenueBase Smart Search rates how each company's information relates to government contract 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	SNP Security	Partial evidence	West Ryde, AustraliaHQ checked Sep 3, 2026	1,001-5,000	508 contacts →
	Partial evidence “Founded in 1923, SNP is one of Australia’s leading security services providers with over 2,500 employees nationwide.” Source: RevenueBase Database · checked Sep 3, 2026
2	NPB Security Australia	Indirect evidence	Perth, AustraliaHQ checked Sep 3, 2026	1,001-5,000	191 contacts →
	Indirect evidence “Static Guards Mobile Patrols Crowd Control” Source: RevenueBase Database · checked Sep 3, 2026
3	ISEC	Strong evidence	Alexandria, AustraliaHQ checked Sep 3, 2026	201-500	85 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 3, 2026
4	National Protective Services	Partial evidence	South Melbourne, AustraliaHQ checked Sep 3, 2026	1,001-5,000	81 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
5	AG Security Group	Partial evidence	Adelaide, AustraliaHQ checked Sep 3, 2026	51-200	72 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
6	CPS Security Services	Partial evidence	Epping, AustraliaHQ checked Sep 3, 2026	51-200	62 contacts →
	Partial evidence “We are CPS Security Services, a 100% Australian-owned and operated company founded in 2006.” Source: RevenueBase Database · checked Sep 3, 2026
7	Exec Security	Partial evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	501-1,000	58 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
8	Advent Security Australia & NEW Zealand	Partial evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	501-1,000	54 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
9	Guardian Venue Management International	Partial evidence	Sydney, AustraliaHQ checked Sep 3, 2026	201-500	54 contacts →
	Partial evidence “Guardian Venue Management International is a proudly Australian-owned company, dedicated to delivering the highest standards of Security Solutions, Customized Protection, Traffic…” Source: RevenueBase Database · checked Sep 3, 2026
10	Group 1 Security	Indirect evidence	Sydney, AustraliaHQ checked Sep 3, 2026	201-500	25 contacts →
	Indirect evidence “FreeCall 1800 GROUP 1.” Source: RevenueBase Database · checked Sep 3, 2026
11	AMA Security	Strong evidence	Adelaide, AustraliaHQ checked Sep 3, 2026	51-200	21 contacts →
	Strong evidence “AMA Security is a provider of strategically tailored security solutions for commercial, business & industry, Government and Defence clients.” Source: RevenueBase Database · checked Sep 3, 2026
12	Excell Security	Partial evidence	Altona North, AustraliaHQ checked Sep 3, 2026	51-200	15 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
13	Castle Security	Strong evidence	Malaga, AustraliaHQ checked Sep 3, 2026	11-50	14 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 3, 2026
14	Mondiaux Security	Partial evidence	Fyshwick, AustraliaHQ checked Sep 3, 2026	51-200	11 contacts →
	Partial evidence “Mondiaux Security, your resident 'Industrial Strength Security' provider.” Source: RevenueBase Database · checked Sep 3, 2026
15	AMG Security	Strong evidence	Point Cook, AustraliaHQ checked Sep 3, 2026	51-200	11 contacts →
	Strong evidence “Security Services Australia - Guards, Patrols, Events, Retail, Hospitality, Health Care, Government and Industry” Source: RevenueBase Database · checked Sep 3, 2026
16	Classique Security	Partial evidence	Perth, AustraliaHQ checked Sep 3, 2026	11-50	9 contacts →
	Partial evidence “Classique Security is Western Australia's most professional emerging security agency.” Source: RevenueBase Database · checked Sep 3, 2026
17	Helex Pty. LTD	Indirect evidence	Belmore, AustraliaHQ checked Sep 3, 2026	11-50	8 contacts →
	Indirect evidence “Helex Pty.” Source: RevenueBase Database · checked Sep 3, 2026
18	Barwon Security	Partial evidence	Geelong, AustraliaHQ checked Sep 3, 2026	11-50	8 contacts →
	Partial evidence “At Barwon Security we pride ourselves on providing a high level of professional serviced to all our existing and new customers.” Source: RevenueBase Database · checked Sep 3, 2026
19	Nepean Regional Security	Partial evidence	Penrith, AustraliaHQ checked Sep 3, 2026	11-50	8 contacts →
	Partial evidence “Nepean Regional Security or NRS as some like to call us is one of the most awarded security companies in the state.” Source: RevenueBase Database · checked Sep 3, 2026
20	Australis Security	Partial evidence	Port Melbourne, AustraliaHQ checked Sep 3, 2026	11-50	7 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
21	Standby Security Services PTY LTD	Indirect evidence	Newtown, AustraliaHQ checked Sep 3, 2026	51-200	7 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 3, 2026
22	Security Management Australasia	Strong evidence	Wangara, AustraliaHQ checked Sep 3, 2026	11-50	6 contacts →
	Strong evidence “Security Management Australasia (SMA) throughout the past 24 years have achieved high level experience in Large Commercial, Enterprise, Local and State Government, Mining…” Source: RevenueBase Database · checked Sep 3, 2026
23	Genesis Security WA PTY LTD	Indirect evidence	Jandakot, AustraliaHQ checked Sep 3, 2026	51-200	5 contacts →
	Indirect evidence “Service is Everything.” Source: RevenueBase Database · checked Sep 3, 2026
24	Master King Security PTY LTD	Partial evidence	Lavington, AustraliaHQ checked Sep 3, 2026	51-200	5 contacts →
	Partial evidence “Albury based security company” Source: RevenueBase Database · checked Sep 3, 2026
25	3m Security PTY LTD	Partial evidence	Fairfield West, AustraliaHQ checked Sep 3, 2026	11-50	4 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 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: government contract 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 government contract security companies.
Partial evidence: Its own public description names part of government contract security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government contract 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 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

12.9%Verified-email coverage

4.0%Mobile-number coverage

16.1Average contacts per company

11-50Median size (employees)

11.8%Largest-city concentration · Melbourne

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

2131–60

12561–90

8190–180

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 government contract 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 “government contract 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 government contract 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 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 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, 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

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 government contract 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 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 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.