Bruce K. Siddle is the managing partner of Human Factor Research Group and a group of inter-related companies that provides training and contract services to emergency rescue, law enforcement, military and counter-terrorism personnel and the CEO of Detonics Defense Technologies, which features the first combat human factor engineered firearm designed to enhance precision under combat stress.

Over a period of three decades, Mr. Siddle’s career has included supporting hundreds of Municipal, State, and Federal law enforcement agencies, intelligence agencies, and the Department of Defense Special Operations community. 

Mr. Siddle is an international authority in the study of high risk and precision human factors.  Mr. Siddle is credited with pioneering the study of survival stress and how it impacts the performance of law enforcement officers, military personnel and combat aviators.  His pivotal research into the influence of the Sympathetic Nervous System on perceptual processing, cognitive processing, motor performance and memory, is now widely incorporated in performance based training for the criminal justice, military special operations and the combat aviation sectors.  

Mr. Siddle has authored numerous articles, white papers and research abstracts addressing survival stress, survival reaction time; all researching the relationship between precision performance and the affects of negative stress on precision performance.  He has personally funded and coordinated 38 research projects.  Since 1999, Mr. Siddle’s research has specifically focused on the study of pre-attentive processing during high risk environments and time-compressed response times. 

Bruce Siddle has been a guest speaker for hundreds of agencies throughout the United States, including the Federal Law Enforcement Training Center, International Association of Chief's of Police, the National Sheriff's Association, the International Association of Firearms Instructors, the Academy for Criminal Justice Sciences and the American Society of Law Enforcement Trainers, the U.S. Department of Homeland Security, to name just a few. 

He has been a consultant for the U.S. Dept. of Navy's Redcell, U.S. Dept. of Army's Delta Force, U.S. Air Force, U.S. Dept. of State’s Mobile Security Unit, U.S. Dept. of Defense, U. S. Bureau of Alcohol, Tobacco & Firearms, the U. S. Secret Service Counter Assault Team and Firearms Training Unit, Federal Bureau of Investigation's Hostage Rescue Unit, Federal Aviation Administration Air Marshals, and various military special operation/warfare units since 1986. 

Mr. Siddle has been a training consultant to the Hong Kong government since 1988, working for the Hong Kong Police and the Hong Kong Corrections training academy, as well as the United Kingdom police and prison agencies, and several close-in-protection contracts for the Queen of England's personal protection unit (Royal Protection Group).  Mr. Siddle was a contract instructor for the intelligence community since 1988. 

Bruce Siddle has held security clearances through the Department of Army, Department of State and the CIA.

Post September 11, 2001, Mr. Siddle’s companies received contracts from the TSA to conduct all of the passenger screener training, to design and implement the Federal Flight Deck Officer’s training system, and to design and train thousands of Federal Air Marshals. 

Mr. Siddle has been a guest on Fox News, NPR, Dave Glover, Glenn Beck and a featured combat human factors expert on a Smithsonian Institute/History Channel special regarding elite counter-terrorism units. In 2010, Mr. Siddle was inducted into the Black Belt Hall of Fame. 

In 2013, the leadership of the Federal Law Enforcement Training Center/DHS nominated Mr. Siddle to receive the President of the United States’ “White House Champions of Change Award” in regard to his ongoing research.

In 2015, Mr. Siddle was honored to support the Michigan Attorney’s General Office in the submission of an amicus brief for the United States Supreme Court.

In 2016, Mr. Siddle finalized six years of continuous research on threat pattern recognition in the context of pre-attentive processing, reaction time and critical skills decision-making in lethal environments.