Company lists · Data refreshed September 2026

Top 25 Oil and gas security companies based in the United Kingdom

RevenueBase identified 1,150 oil and gas security companies headquartered in the United Kingdom as of September 2026 and tracks 106,010 professional contacts across them, including 5,862 with verified work emails and 8,756 with mobile numbers. London is the largest hub.

This list covers oil and gas security companies headquartered in the United Kingdom, 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
1,150Companies
106,010Contacts tracked
5,862Verified emails
8,756Mobile numbers
Explore all 1,150 companies → Free signup · no credit card · 500 free credits

The 25 largest oil and gas security companies based in the United Kingdom

Ranked by team size
Top 25 of 1,150 oil and gas security companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names oil and gas 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
G4sPartial evidence
London, United KingdomHQ checked Sep 5, 202610001+79,699

“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…”

Source: company website · checked Sep 5, 2026
2
Chubb Fire & SecurityIndirect evidence
Staines, United KingdomHQ checked Sep 5, 202610001+6,169

“Making the world a safer place.”

Source: company website · checked Sep 5, 2026
3
Wilson JamesIndirect evidence
Westcliff-on-sea, United KingdomHQ checked Sep 5, 20265,001-10,0001,842

“Wilson James provides safe, secure, customer-led solutions to more than 300 clients across the UK and Europe.”

Source: company website · checked Sep 5, 2026
4
CIS Security LimitedPartial evidence
London, United KingdomHQ checked Sep 5, 20261,001-5,000919

“CIS Security is an independent security company equipped to help customers to solve the complex challenges in today’s digital, connected and regulated business world.”

Source: company website · checked Sep 5, 2026
5
SecurigroupPartial evidence
United KingdomHQ checked Sep 5, 20261,001-5,000765

“Ranked in the top 1% of UK security companies, as approved by the Security Industry Authority, SecuriGroup is an award-winning security company, specialising in the provision of…”

Source: company website · checked Sep 5, 2026
6
Ward SecurityPartial evidence
London, United KingdomHQ checked Sep 5, 20261,001-5,000419

“Ward is an award winning, privately owned business, providing bespoke risk and security solutions including protective security personnel, explosive search dogs, narcotic search…”

Source: company website · checked Sep 5, 2026
7
Regency SecurityPartial evidence
Braintree, United KingdomHQ checked Sep 5, 20261,001-5,000326

“Established in 1993, with commitment to our customers and staff alongside a strong ethos and standards driven approach, Regency Security is now the largest provider of door…”

Source: company website · checked Sep 5, 2026
8Woking, United KingdomHQ checked Sep 5, 2026201-500205

“Pilgrims are a global security, risk management and service support company that identifies and manages risks for clients across all sectors, including oil & gas, telecoms…”

Source: company website · checked Sep 5, 2026
9Romford, United KingdomHQ checked Sep 5, 2026201-500200

“OpenView Security Solutions is the UK’S largest privately owned independent security company and provides unique, innovative and technologically excellent solutions to meet…”

Source: company website · checked Sep 5, 2026
10
Abca Fire And SecurityPartial evidence
Newcastle Upon Tyne, United KingdomHQ checked Sep 5, 2026201-500195

“Surefire Business Protection No matter the sector you work in, or where you’re located in the UK, we can help you to make sure that fire and security problems are not things you…”

Source: company website · checked Sep 5, 2026
11Leeds, United KingdomHQ checked Sep 5, 20261,001-5,000180

“Established in 1978, Bridgegate Security is proud to be one of the UK’s largest independent security contractors.”

Source: company website · checked Sep 5, 2026
12
Guarding UKIndirect evidence
Enfield, United KingdomHQ checked Sep 5, 2026501-1,000166

“We are GUK.”

Source: company website · checked Sep 5, 2026
13
The Brooknight GroupPartial evidence
Milton Keynes, United KingdomHQ checked Sep 5, 2026201-500166

“Providing Exceptional Security Services to Corporate and Retail Customers - Brooknight Security, with over 30 years of experience, is the go-to choice for businesses seeking…”

Source: company website · checked Sep 5, 2026
14Sidcup, United KingdomHQ checked Sep 5, 2026201-500166

“Trigion Security Services is the UK provider of Security Guarding and Technical Solutions for Facilicom UK.”

Source: company website · checked Sep 5, 2026
15
QCICPartial evidence
London, United KingdomHQ checked Sep 5, 202651-200159

“QCIC is an award-winning global engineering firm specialising in designing, building and running security systems.”

Source: company website · checked Sep 5, 2026
16
Premium Security ServicesPartial evidence
Acton, United KingdomHQ checked Sep 5, 202611-50148

“Premium Security Services (PSS) delivers expert security solutions across the leisure, retail, and commercial sectors.”

Source: company website · checked Sep 5, 2026
17
Dardan SecurityIndirect evidence
Cambridge, United KingdomHQ checked Sep 5, 2026201-500141

“Established in 1973, we have been protecting brands and businesses for over 40 years.”

Source: company website · checked Sep 5, 2026
18
The Keyholding CompanyPartial evidence
London, United KingdomHQ checked Sep 5, 202651-200137

“The Keyholding Company are a tech-enabled mobile security services company, specialising in alarm response, mobile patrols, locks and unlocks, emergency and temporary guarding…”

Source: company website · checked Sep 5, 2026
19
Kingdom Security ServicesPartial evidence
Newton-le-willows, United KingdomHQ checked Sep 5, 20265,001-10,000126

“About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.”

Source: company website · checked Sep 5, 2026
20Watford, United KingdomHQ checked Sep 5, 202651-200116

“TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.”

Source: company website · checked Sep 5, 2026
21London, United KingdomHQ checked Sep 5, 2026201-500113

“Hobark International Limited (HIL) is an Integrated Services Company whose subsidiaries: DrillPet International Limited (DIL), Uniterm Nigeria Limited (UNL), UltiProc Nigeria…”

Source: company website · checked Sep 5, 2026
22
Guardforce Security LimitedIndirect evidence
Hornchurch, United KingdomHQ checked Sep 5, 2026501-1,000111

“We are a well-established company that supplies specialist Close Protection, Door Supervisor services to Private Individuals, Visiting Royal Families, Government Officials…”

Source: company website · checked Sep 5, 2026
23
Octavian SecurityPartial evidence
Bingham, United KingdomHQ checked Sep 5, 2026201-50091

“Octavian Security is part of the Octavian Group, a global leader delivering integrated solutions across security, facilities management, and technology-led services.”

Source: company website · checked Sep 5, 2026
24
K4 Security - K4 GroupPartial evidence
Hounslow, United KingdomHQ checked Sep 5, 2026201-50089

“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.”

Source: company website · checked Sep 5, 2026
25Whiteley, United KingdomHQ checked Sep 5, 2026501-1,00087

“Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.”

Source: company website · checked Sep 5, 2026

Showing 25 of 1,150 oil and gas security companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,862 reachable decision-makers.

Free signup · no credit card

See all 1,150 companies

Oil and gas security companies based in the United Kingdom at a glance

As of Sep 5, 2026
11-50Median size (employees)
LondonLargest hub · 286 HQs
8,756Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
391
11-50
362
51-200
250
201-500
91
501-1,000
24
1,001-5,000
15
5,001-10,000
3
10001+
5

Verified emails by last verification

0–30
5,526
31–60
311
61–90
3
90–180
1
180+
21

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 oil and gas 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 the United Kingdom whose own description of what they do matches “oil and gas 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 oil and gas security companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 5,862 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 oil and gas security companies are there based in the United Kingdom?

RevenueBase identified 1,150 oil and gas security companies headquartered in the United Kingdom 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?

G4s, headquartered in London, tops this list with the largest team on record.

Which city has the most oil and gas security companies?

London leads with 286 headquartered companies, followed by Birmingham (31) and Manchester (27).

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 5,862 verified decision-maker contacts tracked across these 1,150 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.

Ready to reach these companies? Verified emails and direct dials for all 1,150 oil and gas security companies based in the United Kingdom. Start with a free account, no credit card.

Get the full list

Related lists

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.