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View TST Private Security's top competitors like ADT, AEGIS Security & Investigations Inc., and Allied Universal Corporation.

FJC Security Services, Inc.
FJC Security Services offers the best security solutions throughout the entire United States. With capabilities that include the integration of our uniformed security personnel with leading-edge technologies and strategic consulting services, we provide the most cost-efficient, effective protective solutions for your specific needs. FJC Security Services, Inc. is an equal opportunity employer. We encourage minorities, women, veterans and disabled individuals to apply. If you have a disability that requires an accommodation to complete the application process, please email FJC’s Human Resources Department at HumanResources@fjcsecurity.com. Please include your full name, contact information and details about your request in the email.
Floral Park, New York, US
Private
$300M Revenue
http://www.fjcsecurity.com
1.3K Employees
ADT
ADT is the most trusted name in smart home security, helping protect and connect what matters most at home and beyond. When Every Second Counts, Count on ADT đź’™.
Boca Raton, Florida, US
Public
$5.1B Revenue
https://www.adt.com/
26.1K Employees
ADT Ticker
G4S
G4S is the International business of Allied Universal®, the world’s leading security and facility services provider and trusted partner to more than 400 of the Fortune 500. Allied Universal® delivers unparalleled customer relationships, innovative solutions, cutting-edge smart technologies and tailored services that enable clients to focus on their core businesses. With operations in over 100 countries and territories, Allied Universal is the third largest private employer in North America and seventh in the world. Annual revenue is approximately $23 billion. There is no greater purpose and responsibility than serving and helping to safeguard customers, communities and people. For more information, visit g4s.com.
UK
Public
$20B Revenue
http://www.g4s.com
118.5K Employees
LSE:GFS Ticker
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
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