Mark Errington
Nicest Guy You'll Ever Meet!
Here’s the list of the top 30 security companies in the USA, organized by the number of employees:
1. Allied Universal
- Employees: ~800,000
- Founded: 1957
2. Securitas AB
- Employees: ~350,000
- Founded: 1934 (Sweden), expanded to the USA in 1999
3. GardaWorld
- Employees: ~120,000
- Founded: 1995
4. G4S (now part of Allied Universal)
- Employees: ~150,000 (prior to acquisition)
- Founded: 2004 (merged from Group 4 Falck and Securicor)
5. Universal Protection Service (part of Allied Universal)
- Employees: ~200,000 (prior to merger with Allied Barton)
- Founded: 1965
6. ADT
- Employees: ~20,000
- Founded: 1874
7. Constellis
- Employees: ~21,000
- Founded: 2010 (formed from several security companies including Triple Canopy)
8. Vivint Smart Home
- Employees: ~11,000
- Founded: 1999
9. Paragon Systems
- Employees: ~12,000
- Founded: 1983
10. Akal Security
- Employees: ~12,000
- Founded: 1980
11. PalAmerican Security
- Employees: ~10,000
- Founded: 1997
12. Andrews International (now part of Allied Universal)
- Employees: ~10,000 (prior to acquisition)
- Founded: 1988
13. Covenant Aviation Security
- Employees: ~3,000
- Founded: 2002
14. Convergint Technologies
- Employees: ~7,500
- Founded: 2001
15. Security Industry Specialists (SIS)
- Employees: ~5,000
- Founded: 1999
16. Triple Canopy (now part of Constellis)
- Employees: ~5,000
- Founded: 2003
17. Stanley Security (now part of Securitas AB)
- Employees: ~5,000 (prior to acquisition)
- Founded: 1843 (originally Stanley Works)
18. Brinks Home Security
- Employees: ~5,000
- Founded: 1859
19. US Security Associates (now part of Allied Universal)
- Employees: ~50,000 (prior to acquisition)
- Founded: 1955
20. SOS Security
- Employees: ~17,000
- Founded: 1969
21. Guardian Protection Services
- Employees: ~1,300
- Founded: 1950
22. CPI Security Systems
- Employees: ~1,200
- Founded: 1991
23. Monitronics International
- Employees: ~1,100
- Founded: 1994
24. Protect America
- Employees: ~1,000
- Founded: 1992
25. Vector Security
- Employees: ~2,000
- Founded: 1970
26. Per Mar Security Services
- Employees: ~2,500
- Founded: 1953
27. First Alarm Security & Patrol
- Employees: ~1,000
- Founded: 1966
28. Alarm.com
- Employees: ~1,000
- Founded: 2000
29. Central Security Group
- Employees: ~500
- Founded: 1978
30. Asylon Robotics
- Employees: ~100
- Founded: 2014
This list is ordered by the size of the workforce, showing a mix of companies with varying specializations and histories.