- Cambodian Special Forces
- Danish Law Enforcement
- Hellenic (Greek) Coast Guard
- Mexican Federal Police
- Mexican Prison Guards
- New Zealand Prison Guards
- Norwegian Law Enforcement
- Russian Criminal Investigation Division
- Russian Homicide and Major Crimes
- Russian Ministry of Internal Affairs
- Russian Spetsnaz Counterterrorism
- South African Military
- South African Law Enforcement
- South African Corrections
- South African Executive Protection
- Spanish Law Enforcement
- Swedish Law Enforcement
- US Intelligence Agencies
- US Special Forces
- US Secret Service / ERT
- Internal Revenue Service / CID
- Federal Bureau of Investigation
- Drug Enforcement Administration
- Federal US Attorney
- New England Organized Crime / Drug Enforcement Task Force
- IALEFI Int'l Conference
- Massachusetts State Police / SWAT
- Massachusetts State Police
- Massachusetts Defensive Tactics Instructors
- Suffolk County Sheriff’s and Corrections
- Rhode Island Sheriffs
- Boston Municipal Police Academy
- Plainville Municipal Police
- Rhode Island Adult Correctional Institute / SWAT
- Rhode Island Brotherhood of Corrections Officers
- Executive Protection
- Private Security Firms
- Companies and Businesses
- Martial arts organizations
- High-risk groups
- Community organizations
- Thousands of individuals