William "Bill" Sellier

William "Bill" Sellier is an American still photographer, tactical authority, and U.S. Army veteran. He spent his early years immersed in independent filmmaking. As a teenager, he graduated from the prestigious School of Modern Photography and quickly established himself as a trusted set photographer, capturing behind-the-scenes and promotional imagery for notable films of the era.
After graduating from high school, Sellier became an Emergency Medical Technician. In the early 1980s, he transitioned from cinema to a highly decorated career in public service and tactical defense. Serving as a Deputy and SWAT Commander for the Wasatch County Sheriff's Office in Utah, he was one of the first advanced tactical officers on the scene during the 1988 Marion, Utah church bombing leading to one of America’s most infamous standoffs with law enforcement.
Parallel to his law enforcement career, Sellier excelled in the military. He served as a Nuclear, Biological, and Chemical (NBC) Specialist for the elite 19th Special Forces Group (Airborne) and flew fire reconnaissance for the U.S. Forest Service as a rated pilot. He later served as a flight combat medic for the 1250th Medical Company (Air Ambulance) and commanded soldiers as a Quick Reaction Force Sergeant within the historic 25th Infantry Division while assigned to the 71st Chemical Company. This included responding to critical emergency chemical accident (CAIRA) missions on Johnston Island in the 1990s. By the end of his military career, he achieved the rare distinction of formally holding three Military Occupational Specialties (MOS) and wearing three separate sets of Army wings.
Following his military commitment, Sellier leveraged his aviation and technical background as a civilian defense contractor for industry titans such as Thales and Moog. Today, he remains a recognized industry authority on Tactical Air Navigation (TACAN) systems.