Security and Investigations Company Search & Contact Data – Page 4

List of Security and Investigations Companies

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

Company NameIndustryLocationFundingRevenueEmployees

Global Security Services

Security and Investigations

United States, Iowa, Davenport

$25M - $50M

265

USA Security

Security and Investigations

United States, Minnesota, Eden Prairie

$50M - $100M

262

Johnson Controls

Security and Investigations

United States, Texas, San Antonio

$1M - $10M

259

Security Officer School

Security and Investigations

United States, Nebraska, Omaha

$250M - $500M

259

Sentry Security

Security and Investigations

United States, Illinois, Wheeling

$10M - $25M

257

Strategic Security Corporation

Security and Investigations

United States, New York, Smithtown

$25M - $50M

257

Alarm Detection Systems

Security and Investigations

United States, Illinois, Aurora

$25M - $50M

256

Kisi

Security and Investigations

United States, New York, Brooklyn

$1.6M

$50M - $100M

254

Command Investigations

Security and Investigations

United States, Florida, Lake Mary

$50M - $100M

252

Guardian Security Services, Inc.

Security and Investigations

United States, Illinois, Blue Island

$25M - $50M

251

NSA

Security and Investigations

South Africa, Gauteng, Johannesburg

$100M - $250M

251

PHOENIX PROTECTIVE CORP

Security and Investigations

United States, Washington, Spokane Valley

$25M - $50M

249

Security Solutions of America

Security and Investigations

United States, Georgia, Alpharetta

$10M - $25M

248

Securitas Australia

Security and Investigations

Australia, Victoria, Preston

$1M - $10M

246

Blackstone Security Services, Inc.

Security and Investigations

United States, Arizona, Phoenix

$25M - $50M

243

Advantage Investigations

Security and Investigations

United States, North Carolina, Kannapolis

$25M - $50M

242

fpg

Security and Investigations

United Kingdom, Scotland, Linlithgow

$1M - $10M

240

American Security

Security and Investigations

United States, South Carolina, Greenville

$25M - $50M

239

Citiguard

Security and Investigations

United States, California, Woodland Hills

$10M - $25M

239

Lagarda Security

Security and Investigations

United States, Michigan, Burton

$25M - $50M

239

OpenView Security Solutions Limited

Security and Investigations

United Kingdom, England, London

$1M - $10M

239

VRC Investigations

Security and Investigations

United States, Texas, Dallas

$25M - $50M

239

Reel Security Corp.

Security and Investigations

United States, California, Beverly Hills

$25M - $50M

238

AGB Investigative Services

Security and Investigations

United States, Illinois, Chicago

$25M - $50M

237

General Security

Security and Investigations

United States, New York, Plainview

$250M - $500M

236

Stanley Security Solutions

Security and Investigations

$25M - $50M

235

Affiliated Monitoring

Security and Investigations

United States, New Jersey, Union

$50M - $100M

234

Guardian Security Systems, Inc.

Security and Investigations

United States, Washington, Seattle

$25M - $50M

233

Stone Security, a BearCom Company

Security and Investigations

United States, Utah, Salt Lake City

$25M - $50M

233

Vinson Guard Service, Inc.

Security and Investigations

United States, Louisiana, Metairie

$50M - $100M

233

MG - Mulligan Security

Security and Investigations

United States, New York, New York

$25M - $50M

232

First Response Security

Security and Investigations

United States, Oregon, Beaverton

$10M - $25M

230

Titan Protection and Consulting, Inc.

Security and Investigations

United States, Kansas, Overland Park

$25M - $50M

230

Premier Security

Security and Investigations

United States, Oregon, Springfield

$10M - $25M

228

ACESGroup

Security and Investigations

Australia, New South Wales, Redfern

$1M - $10M

227

MaxSent

Security and Investigations

United States, Maryland, Annapolis

$25M - $50M

227

ADEMCO SECURITY GROUP

Security and Investigations

Singapore, Central Region, Singapore

$25M - $50M

226

Abel

Security and Investigations

United Kingdom, England, Leicester

$1M - $10M

225

Cypress Private Security

Security and Investigations

United States, California, San Francisco

$25M - $50M

225

OPS Security Group

Security and Investigations

United States, Pennsylvania, Conshohocken

$25M - $50M

224

Total Security Solutions

Security and Investigations

United States, Michigan, Fowlerville

$25M - $50M

224

AMAG Technology

Security and Investigations

United States, California, Hawthorne

$50M - $100M

223

NextGen Security

Security and Investigations

United States, Pennsylvania, Exton

$50M - $100M

223

First Alarm

Security and Investigations

United States, California, Aptos

$25M - $50M

222

G1 Group

Security and Investigations

Israel, Central District, Petaẖ Tiqwa

$50M - $100M

222

Strike Force

Security and Investigations

United States, New Jersey, Union

$10M - $25M

221

Datawatch Systems

Security and Investigations

United States, Maryland, Bethesda

$50M - $100M

220

AEGIS Protective Services

Security and Investigations

United States, Ohio, Cincinnati

$25M - $50M

219

W.I.S. Sicherheit + Service GmbH & Co. KG

Security and Investigations

Germany, North Rhine-Westphalia, Köln

$1M - $10M

219

Safety Service Systems Inc. (S3, Inc.)

Security and Investigations

United States, Illinois, Chicago

$10M - $25M

218

Patriot Security EOC

Security and Investigations

United States, Texas, Nederland

$25M - $50M

215

Power Home Technologies

Security and Investigations

United States, North Carolina, Raleigh

$25M - $50M

215

Pacwest Security Services

Security and Investigations

United States, California, Costa Mesa

$25M - $50M

214

Central Defense Security, LLC

Security and Investigations

United States, Tennessee, Memphis

$50M - $100M

213

Diversified Protection Corporation

Security and Investigations

United States, South Carolina, Daniel Island

$25M - $50M

211

Protection Strategies Incorporated

Security and Investigations

United States, Tennessee, Knoxville

$25M - $50M

211

Nighthawk Security Company

Security and Investigations

United States, Kentucky, Owensboro

$10M - $25M

210

Security Resources LLC

Security and Investigations

United States, New Jersey, Cherry Hill

$25M - $50M

210

Dollar General Stores

Security and Investigations

United States, Pennsylvania, Allentown

$50M - $100M

207

Sotel Groupe

Security and Investigations

France, Occitanie, L'union

$10M - $25M

207

Reliance Security

Security and Investigations

United States, Nevada, Las Vegas

$10M - $25M

206

Orion Security Services

Security and Investigations

United States, California, San Jose

$1M - $10M

205

FACT

Security and Investigations

United Kingdom, England, London

$1M - $10M

204

Kellington Protection Service, LLC

Security and Investigations

United States, Pennsylvania, Pittsburgh

$25M - $50M

203

AEGIS Security & Investigations Inc.

Security and Investigations

United States, California, Culver City

$10M - $25M

201

ALLWays Secure, Inc.

Security and Investigations

United States, New York, Montgomery

<$1M

201

AMP

Security and Investigations

United States, Utah, Orem

$1M - $10M

201

ASIS West Coast Chapter

Security and Investigations

United States, Florida, Tampa

<$1M

201

Ares Global Security

Security and Investigations

United States, Florida, Tampa

$25M - $50M

201

Blueline Security Services

Security and Investigations

United States, Maryland, Landover

$1M - $10M

201

C&D Security

Security and Investigations

United States, Colorado, Colorado Springs

$10M - $25M

201

Chief Protective Services Inc.

Security and Investigations

United States, California, Corona

$1M - $10M

201

Criterion Holdings Corporation (A Family of Security Companies)

Security and Investigations

United States, Florida, Apopka

$250K

$1M - $10M

201

ECAMSECURE (now ECAM)

Security and Investigations

United States, California, Long Beach

$10M - $25M

201

Front Sight Firearms Training Institute

Security and Investigations

United States, California, Windsor

$10M - $25M

201

GOLDEN SVCS LLC

Security and Investigations

United States, Tennessee, Oak Ridge

$1M - $10M

201

Global Protection Group, LLC

Security and Investigations

United States, California, Santa Ana

$1M - $10M

201

IAS (moved)

Security and Investigations

United States

$1M - $10M

201

ISSA (Metro Atlanta)

Security and Investigations

United States

<$1M

201

Imperial Security, LLC.

Security and Investigations

United States, Pennsylvania, Philadelphia

$1M - $10M

201

JSD Protective Services

Security and Investigations

United States, New York, New York

$1M - $10M

201

My Alarm Center

Security and Investigations

United States, Pennsylvania, Newtown Square

$10M

$1M - $10M

201

Peak Security

Security and Investigations

United States, Utah, Salt Lake City

$1M - $10M

201

RIBI Security

Security and Investigations

United States, Rhode Island, Providence

$10M - $25M

201

SEAL Security LLC

Security and Investigations

United States, New York, New York

$1M - $10M

201

SMS Security

Security and Investigations

Canada, Ontario, Toronto

$1M - $10M

201

SSD Systems

Security and Investigations

United States, California, Anaheim

$50M - $100M

201

SafeMart

Security and Investigations

United States, Illinois, Evanston

$10M - $25M

201

Schaad Detective Agency Inc

Security and Investigations

United States, Pennsylvania, York

$1M - $10M

201

SecureNet Protection Services

Security and Investigations

United States, California, Santa Ana

$1M - $10M

201

Sterling Protective Services, Inc.

Security and Investigations

United States, Texas, Richardson

$1M - $10M

201

Strike Force Protective Services

Security and Investigations

United States

$10M - $25M

201

TIG Risk Services

Security and Investigations

United States, Florida, Destin

$1M - $10M

201

ThreatSwitch

Security and Investigations

United States, North Carolina, Charlotte

$2.6M

<$1M

201

Traka Americas

Security and Investigations

United States, Florida, Orlando

<$1M

201

U.S. Response and Investigations

Security and Investigations

United States

201

USS Agency

Security and Investigations

United States, Florida, Orlando

$1M - $10M

201

VMS Alarms

Security and Investigations

United States, Rhode Island, Warwick

$1M - $10M

201

Vanderbilt International (SIEMENS divestment)

Security and Investigations

<$1M

201

Vio Security

Security and Investigations

United States, California, Woodland Hills

$1M - $10M

201

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 Global Security Services, USA Security and Johnson Controls. 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.

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List of Security and Investigations Companies

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What technologies do Security and Investigations companies use?

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Security and Investigations Companies

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List of Security and Investigations Companies

About Security and Investigations companies

Which Security and Investigations companies are listed?

Where are Security and Investigations companies located?

What technologies do Security and Investigations companies use?

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

Search by Industry

Search by Country

Search by Technology

Top companies by employee count

Ready to create more pipeline?

Find key decision makers, at the right time,
with the right message.