Best known for his role as an investigator on the History Channel's docu-reality series Hunting Hitler, Mike Simpson has served over three decades in the military as an Airborne Ranger, a Green Beret, and a doctor of emergency medicine assigned to the Joint Special Operations Command (JSOC).

Trained as a demolitions expert, SWAT sniper, high altitude low opening (HALO) parachutist, civilian paramedic, Special Forces medic, operations and intelligence sergeant, and board-certified emergency medicine physician, Mike now uses his extensive knowledge of training and medicine to help men over forty achieve peak physical condition.