Jack Trimarco entered the Federal Bureau of Investigation as a Special Agent after having served four years in the U.S. Air Force and seven years as a Yellowstone County Deputy Sheriff detective. His areas of expertise include: F.B.I. Polygraph Examiner, F.B.I. Hostage Negotiator, F.B.I. Expertise Psychological Profiler, F.B.I. Defensive Tactics/Firearms Instructor, F.B.I. S.W.A.T. Team Member, F.B.I. Interrogation Instructor and Homicide Investigation Instructor.
Jack has worked on numerous high-profile cases including: the Centennial Olympic Park Bombing, the "Unabomber", "Whitewater", The World Trade Center Bombing, the Oklahoma City Bombing, the Princess Cruises Extortion, TWA Flight 800; the assassination in Mexico of DEA Agent Enrique Camarena; and the Bombing of Pan Am Flight 103. In addition, he has conducted training for the F.B.I. Academy, C.I.A., U.S. Attorneys offices, U.S. Department of Justice, I.N.S., and numerous federal, state and local agencies and associations to include the American Polygraph Association, the American Association of Police Polygraphists and the California Association of Polygraph Examiner.