Security and Investigations Company Search & Contact Data | LeadIQ

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List of Security and Investigations Companies

Selling into Security and Investigations? Here are its companies, biggest first, including G4S, Prosegur and Securitas Security Services USA, Inc.. Open a company to see its revenue range, headcount, tech stack and the people to contact.

Company NameIndustryLocationFundingRevenueEmployees

G4S

Security and Investigations

United Kingdom, England, London

$541M

$10B+

117K

Prosegur

Security and Investigations

Spain, Community of Madrid, Madrid

$59K

$10B+

68K

Securitas Security Services USA, Inc.

Security and Investigations

United States, New Jersey, Parsippany

$10B+

45K

GardaWorld

Security and Investigations

Canada, Quebec, Saint-laurent

$2.6B

$1B - $10B

25K

Securitas Nederland

Security and Investigations

Netherlands, Utrecht, Breukelen

$1B - $10B

13K

Tyco

Security and Investigations

Ireland, Cork, Cork

$1B - $10B

12K

Securitas Group

Security and Investigations

Sweden, Stockholm, Stockholm

$4.8B

$1B - $10B

11K

Kaba

Security and Investigations

Switzerland, Zurich, Rümlang

$25M - $50M

10K

SIS

Security and Investigations

India, Delhi, Okhla Industrial Estate

$500M - $1B

10K

Convergint

Security and Investigations

United States, Illinois, Hoffman Estates

$67M

$1B - $10B

7.2K

Bidvest Protea Coin

Security and Investigations

South Africa, Gauteng, Pretoria

$100M - $250M

7K

Constellis

Security and Investigations

United States, Virginia, Herndon

$100M - $250M

6.9K

The GEO Group, Inc.

Security and Investigations

United States, Florida, Boca Raton

$2.2B

$1B - $10B

6.5K

SIS Group Enterprises

Security and Investigations

India, Delhi, Okhla Industrial Estate

$86M

$25M - $50M

6.3K

Paladin Security Group Ltd

Security and Investigations

Canada, British Columbia, Burnaby

$250M - $500M

5.8K

AlliedBarton Security Services

Security and Investigations

$1B - $10B

5.8K

Inter-Con Security

Security and Investigations

United States, California, Pasadena

$500M - $1B

5.3K

Securitas Seguridad España

Security and Investigations

Spain, Community of Madrid, Madrid

$250M - $500M

5.2K

Securitas France

Security and Investigations

France, Île-de-France, Issy-les-moulineaux

$10M - $25M

5.1K

Tyco Integrated Security

Security and Investigations

United States, Florida, Boca Raton

$50M - $100M

5K

Sicuritalia S.p.A.

Security and Investigations

Italy, Lombardy, Milan

$50M - $100M

5K

U.S. Security Associates, Inc.

Security and Investigations

United States, Georgia, Roswell

$500M - $1B

4.6K

HID

Security and Investigations

United States, Texas, Austin

$1B - $10B

4.1K

Securitas Sverige AB

Security and Investigations

Sweden, Stockholm, Stockholm

$10M - $25M

3.7K

SAFE I سيف

Security and Investigations

Saudi Arabia, Riyadh, Ibn Ghannām

$25M - $50M

3.5K

SBV South Africa

Security and Investigations

South Africa, Gauteng, Johannesburg

$100M - $250M

3.5K

Smiths Detection

Security and Investigations

United Kingdom, England, London

$500M - $1B

3.3K

Tyco SimplexGrinnell

Security and Investigations

$1B - $10B

3.2K

Whelan Security

Security and Investigations

United States, Missouri, St. Louis

$250M - $500M

3.2K

Andy Frain Services

Security and Investigations

United States, Illinois, Aurora

$250M - $500M

3.1K

Triple Canopy (A Constellis Company)

Security and Investigations

United States, Virginia, Herndon

$500M - $1B

2.9K

Allied Barton Securtiy

Security and Investigations

United States, Connecticut, Stamford

$500M - $1B

2.8K

HSS

Security and Investigations

United States, Colorado, Denver

$250M - $500M

2.7K

Security Industry Specialists

Security and Investigations

United States, California, Culver City

$1B - $10B

2.7K

Paragon Security

Security and Investigations

Canada, Ontario, North York

$100M - $250M

2.6K

Pronet Security Services

Security and Investigations

Turkey, Istanbul, Eyüp

$1B - $10B

2.6K

Trigion

Security and Investigations

Netherlands, South Holland, Schiedam

$10M - $25M

2.6K

Walden Security

Security and Investigations

United States, Tennessee, Chattanooga

$250M - $500M

2.5K

SSI

Security and Investigations

$500M - $1B

2.5K

Marksman Security

Security and Investigations

United States, Florida, Fort Lauderdale

$250M - $500M

2.4K

Crisis24

Security and Investigations

United States, Maryland, Annapolis

$500M - $1B

2.4K

MSS Security

Security and Investigations

Australia, New South Wales, Parramatta

$100M - $250M

2.3K

Sunstates Security

Security and Investigations

United States, North Carolina, Raleigh

$250M - $500M

2.3K

STANLEY Security

Security and Investigations

United States, Indiana, Fishers

$250M - $500M

2.3K

Paragon Systems Inc

Security and Investigations

United States, Virginia, Herndon

$250M - $500M

2.2K

Fidelity ADT

Security and Investigations

South Africa, Gauteng, Midrand

$50M - $100M

2.2K

Defense Counterintelligence and Security Agency (DCSA)

Security and Investigations

United States, Virginia, Quantico

$500M - $1B

2.2K

Weiser Security Services, Inc.

Security and Investigations

United States, Louisiana, New Orleans

$250M - $500M

2.1K

Securitas AG, Swiss Guarding Company

Security and Investigations

Switzerland, Bern, Zollikofen

$10M - $25M

2.1K

PINKERTON | Comprehensive Risk Management

Security and Investigations

United States, Michigan, Ann Arbor

$250M - $500M

2.1K

Wilson Security

Security and Investigations

Australia, Victoria, Essendon Fields

$100M - $250M

2.1K

Signal

Security and Investigations

United States, Nebraska, Omaha

$1B - $10B

2K

Titan Security Group

Security and Investigations

United States, Illinois, Chicago

$100M - $250M

2K

SERIS France

Security and Investigations

France, Hauts-de-France, Rue

$1M - $10M

2K

Securiguard Services Ltd.

Security and Investigations

Canada, British Columbia, Burnaby

$50M - $100M

1.9K

Securitas Canada

Security and Investigations

Canada, Ontario, North York

$50M - $100M

1.8K

Protectas

Security and Investigations

Switzerland, Vaud, Lausanne

$10M - $25M

1.8K

NUCTECH COMPANY LIMITED

Security and Investigations

China, Beijing, Beijing

$500M - $1B

1.8K

Admiral Security Services

Security and Investigations

United States, Maryland, Bethesda

$250M - $500M

1.8K

Securitas Belgium

Security and Investigations

Belgium, Flanders, Diegem

$1M - $10M

1.8K

Gunnebo

Security and Investigations

Sweden, Västra Götaland, Gothenburg

$25M - $50M

1.7K

Vector Security

Security and Investigations

United States, Pennsylvania, Warrendale

$450M

$250M - $500M

1.7K

Thorburn Security Solutions (Pty) Ltd

Security and Investigations

South Africa, Gauteng

$25M - $50M

1.7K

Securitas Germany

Security and Investigations

Germany, Berlin, Berlin

$25M - $50M

1.7K

St. Moritz Security Services, Inc.

Security and Investigations

United States, Pennsylvania, Pittsburgh

$100M - $250M

1.6K

DSI Security Services

Security and Investigations

United States, Alabama, Dothan

$100M - $250M

1.6K

World Security

Security and Investigations

United Arab Emirates, Dubayy, Dubai

$250M - $500M

1.6K

DataFlow Group

Security and Investigations

United Arab Emirates, Dubayy, Dubai

$50M - $100M

1.6K

AEGIS

Security and Investigations

United States, Virginia, Arlington

$25M - $50M

1.5K

Professional Security

Security and Investigations

United Kingdom, England, Leeds

$25M - $50M

1.5K

GardaWorld Federal Services

Security and Investigations

United States, Virginia, Arlington

$100M - $250M

1.5K

Royal Bank of Scotland (RBS)

Security and Investigations

$1M - $10M

1.5K

Securitas India

Security and Investigations

India, Haryana, Industrial Complex Dundahera

$25M - $50M

1.5K

Rapiscan Systems

Security and Investigations

United States, California, Torrance

$500M - $1B

1.5K

Intercon Security

Security and Investigations

$250M - $500M

1.5K

First Coast Security

Security and Investigations

United States, Florida, Jacksonville

$100M - $250M

1.5K

Arrow Security

Security and Investigations

United States, New York, Smithtown

$100M - $250M

1.5K

Safe Haven Security Services, LLC.

Security and Investigations

United States, Missouri, North Kansas City

$250M - $500M

1.4K

Protection 1 Security Solutions

Security and Investigations

United States, Illinois, Romeoville

$500M - $1B

1.4K

Trablisa

Security and Investigations

Spain, Balearic Islands, Palma

$10M - $25M

1.4K

I-SEC Security

Security and Investigations

Netherlands, North Holland, Schiphol

$100M - $250M

1.4K

Guardsmark

Security and Investigations

United States, New York, New York

$250M - $500M

1.3K

Brosnan Risk Consultants

Security and Investigations

United States, New York, Pearl River

$100M - $250M

1.3K

Corps Security

Security and Investigations

United Kingdom, England, London

$25M - $50M

1.3K

SOS Security LLC

Security and Investigations

United States, New Jersey, Parsippany

$100M - $250M

1.3K

UNDSS

Security and Investigations

United States, New York, New York

$250M - $500M

1.3K

FJC Security Services, Inc.

Security and Investigations

United States, New York, Floral Park

$100M - $250M

1.2K

CIS Security Limited

Security and Investigations

United Kingdom, England, London

$100M - $250M

1.2K

SERIS Belgium

Security and Investigations

Belgium, Flanders, Diegem

$1M - $10M

1.2K

Securitas Critical Infrastructure Services, Inc.

Security and Investigations

United States, Virginia, Herndon

$100M - $250M

1.2K

CCTV Camera Pros

Security and Investigations

United States, Florida, Lantana

$100M - $250M

1.2K

Honeywell Performance Materials and Technology

Security and Investigations

$1M - $10M

1.2K

Protectim Security Group

Security and Investigations

France, Île-de-France, Paris

$1M - $10M

1.2K

FGH Security

Security and Investigations

United Kingdom, England, Manchester

$50M - $100M

1.1K

MorphoTrust USA

Security and Investigations

United States, Massachusetts, Billerica

$1M - $10M

1.1K

2045 - Empresa de Segurança, S.A.

Security and Investigations

Portugal, Lisbon, Malveira

<$1M

1.1K

Allied Security

Security and Investigations

New Zealand, Waikato, Frankton Junction

$25M - $50M

1.1K

Wackenhut

Security and Investigations

$100M - $250M

1.1K

Andrews International

Security and Investigations

United States, California, Burbank

$100M - $250M

1.1K

Security 101

Security and Investigations

United States, Florida, West Palm Beach

$100M - $250M

1K

About Security and Investigations companies

Which Security and Investigations companies are listed?

Security and Investigations companies of every size, from enterprises to startups, sorted by headcount so the biggest accounts come first. Companies on the list include G4S, Prosegur and Securitas Security Services USA, Inc.. Every company profile gives you revenue range, headcount, headquarters, tech stack and an employee directory with verified emails and phone numbers.

Where are Security and Investigations companies located?

Security and Investigations companies are most often headquartered in the United States, the United Kingdom, Canada, Australia, the Netherlands and France.

What technologies do Security and Investigations companies use?

The tools most often found in the tech stacks of Security and Investigations companies include WordPress, Microsoft 365, Amazon Web Services, Google Cloud, Shopify and Google Workspace. Useful if you integrate with, complement or compete with one of them.

How do I reach decision makers at Security and Investigations companies?

Open a company to see its employee directory and email format, then use LeadIQ to get verified work emails and phone numbers for the people you want to reach and push them straight to your CRM or sequencer.

Insights based on LeadIQ data refreshed in September 2026.

Top companies by employee count

Top companies in United States by employee count Top companies in United Kingdom by employee count Top companies in Canada by employee count Top companies in Germany by employee count Top companies in France by employee count Top companies in Australia by employee count Top companies in Netherlands by employee count Top companies in India by employee count Top companies in Spain by employee count Top companies in Switzerland by employee count Top companies in Sweden by employee count Top companies in Italy by employee count Top companies in Denmark by employee count Top companies in Brazil by employee count Top companies in Ireland by employee count

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