Speaker Profile


William “Billy” Castellano

Senior Tactical Instructor, HSS EM Solutions™

Billy is a retired police officer from the Chicago area and the Senior Tactical Instructor for HSS’ Healthcare Active Shooter Program. William is also a former lead law enforcement instructor with the Northeastern Illinois Public Safety Training Academy for their entire force-on-force curriculum.

William’s background in security and law enforcement began as a member of the US Air Force Security Forces where he was tasked with safe guarding nuclear weapons, codes and components. William was also deployed to the Middle East multiple times in a force protection role. Later, as a police officer, William became an active law enforcement instructor and trainer in multiple disciplines including Firearms, Active Shooter Response and Defensive Tactics. In 2005, William deployed to New Orleans immediately following hurricane Katrina to support rescue and recovery operations.

William deployed to Afghanistan as an International Police Mentor for the US Department of State where he spent a year embedded with the US Army in the volatile Ghazni province. His primary responsibility was to act as an advisor to The Afghan National Police. He helped establish effective policing in a rural and austere area of the country where no functional police presence existed previously.

While overseas William was contacted by the security management of a 645 bed, Level I Trauma Center in the Chicago area, and asked to aid in developing an Active Shooter/Armed Intruder response program for the facility’s security component.


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