Robert H. Perry's  2021 Contract Security Industry White Paper

Security Advisor Newsletter Summer 2021

Robert H. Perry's 2020 Industry Review and 2021 Outlook

Security Letter:  2020 List of Largest Guard Companies in U.S. 

Robert H. Perry's 2020 "White Paper" on the State of the Contract Security Industry

U.S. Department of Labor/Bureau of Labor Statistics:

2020 Employment and Wage Data for Security Guards

2020 Occupational Outlook Handbook - Security Guards

Security Letter:  2019 List of Largest Guard Companies in U.S.

2018 Security Magazine List of Top Guarding Companies