Guardian Security Training (GST), situated at 940 Grand Blvd, Unit A, Deer Park, NY 11729, is a leading New York State-approved security guard training facility. Specializing in a diverse range of programs, GST offers foundational courses such as the 8-hour pre-assignment and 16-hour on-the-job training, as well as advanced options, including a 47-hour firearms and 8-hour annual firearms course. The school is unique on Long Island, not just for its breadth of offerings, but also for its specialized training in private investigator development, concealed carry courses, and active shooter response. Their instructors, certified by the New York State Division of Criminal Justice Services (DCJS), come with a wealth of experience, many having backgrounds in law enforcement, legal practice, and military service, which enhances the training with real-world insights.

Adding to their reputation, GST is approved by the National Rifle Association Law Enforcement Division and maintains affiliations with various esteemed organizations, reflecting their commitment to high industry standards. Beyond training, they offer private investigation services, firearm sales, and less lethal options as an authorized BYRNA dealer. Since its inception in 2007, GST has built a solid foundation of credibility through its meticulous compliance with industry regulations, as seen in their various licenses, including the NYS PI and FFL licenses. The school's enduring reputation is bolstered by numerous positive client testimonials highlighting the professionalism and expertise of their instructors, making it a premier choice for security training in New York.