Our instructors have extensive backgrounds in Military, Government, Law Enforcement, Swat Operations, and International Agencies. We have trained some of the world's most elite units. Brian Clark CEO/Chief Instructor Brian S. Clark, CEO of TJA Use of Force Training, LLC has been a Master Instructor of TJA courses for 22 years. He has established his vast knowledge and credibility in the Use of Force over his thirty-year career in the military and corrections. Thomas Archambault President Emeritus, Chief Instructor and Founder Mr. Archambault has trained and certified over 17,000 instructors in Use of Force programs ranging from municipal to Federal levels of Law Enforcement since 1983.