Company lists · Data refreshed September 2026

Top 12 Security contractors based in Sydney, Australia

Name: 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 21, 2026 64 companies tracked

RevenueBase identified 64 security contractors headquartered in Sydney, Australia as of September 2026 and tracks 343 professional contacts across them, including 38 with verified work emails. Sydney is the largest hub.

This list covers 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 21, 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 21, 2026 86% judged on-target in blind review

64Companies

343Contacts tracked

38Verified emails

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The 12 largest security contractors based in Sydney, Australia

Ranked by team size

Top 12 of 64 security contractors based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Guardian Venue Management International	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	53 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 21, 2026
2	Group 1 Security	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	25 contacts →
	Indirect evidence “FreeCall 1800 GROUP 1.” Source: RevenueBase Database · checked Sep 21, 2026
3	Central Monitoring Services	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “At the heart of securing what matters most to you.” Source: RevenueBase Database · checked Sep 21, 2026
4	Nova Security Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
5	Urban Protection Group	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	13 contacts →
	Partial evidence “Urban Protection Group is a trusted partner in delivering comprehensive security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
6	Synergy Protection Agency	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	9 contacts →
	Indirect evidence “Since its conception, in New South Wales, Queensland, Victoria and now the ACT, Always Synergy has grown into a trusted, quality brand that our customers have come to rely upon…” Source: RevenueBase Database · checked Sep 21, 2026
7	AMR Security	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	8 contacts →
	Partial evidence “AMR Security installs and services electronic security systems.” Source: RevenueBase Database · checked Sep 21, 2026
8	Abacus Security Services PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	6 contacts →
	Partial evidence “Abacus is a leading provider of security officers around Australia and has over a decade's experience in specialised government, infrastructure and corporate security.” Source: RevenueBase Database · checked Sep 21, 2026
9	Pinnacle Protection	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “Pinnacle Protection have been providing professional security and training services in Sydney, Illawarra, Wollongong, the Northern Beaches and the Newcastle region for over 20…” Source: RevenueBase Database · checked Sep 21, 2026
10	AUS Security Products	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “Aus Security Products stands as a premier supplier of SCEC endorsed and approved security solutions, serving the Australian government and Defence sectors for over four decades.” Source: RevenueBase Database · checked Sep 21, 2026
11	Integra Security Solutions	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	1 contacts →
	Partial evidence “Sydney’s one-stop-shop for commercial security.” Source: RevenueBase Database · checked Sep 21, 2026
12	Time & Focus	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “With over 20 years in the security industry and over 30 years of providing electronic solutions to technology sectors within construction, banking, defence, education, IT &…” Source: RevenueBase Database · checked Sep 21, 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: 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 security contractors.
Partial evidence: Its own public description names part of security contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name 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 12 of 64 security contractors based in Sydney, Australia

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Security contractors based in Sydney, Australia at a glance

As of Sep 21, 2026

11.1%Verified-email coverage

5.4Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 64 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 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 “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 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 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, 38 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 21, 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.

Security contractors by metro in Australia

Security contractors in Sydney64
Security contractors in Melbourne59
Security contractors in Brisbane25

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 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 security contractors are there based in Sydney, Australia?

RevenueBase identified 64 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?

Guardian Venue Management International, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most security contractors?

Sydney leads with 64 headquartered companies, followed by Melbourne (59) and Brisbane (25).

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 38 verified decision-maker contacts tracked across these 64 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 21, 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.