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Our strength lies in our people. From our world-class instructors to our dedicated support staff, every member of the STG family is committed to providing you with an unparalleled security training experience.
Seasoned professionals with extensive real-world experience and a passion for empowering the next generation of security experts.
Military Police | Presidential Security | USMC
Nick Vasiliou is a U.S. Marine Corps veteran who served as a Military Policeman and a member of the Marine One Presidential Security Detail for George W. Bush. Vasiliou transitioned into civilian security and safety roles, including working as an instructor and security specialist.
NRA Instructor | Executive Protection | Consultant
Florida native and security expert with 15+ years in firearms training and campus safety. Specializing in high-stakes protection for corporate, educational, and religious institutions. NRA Law Enforcement Instructor and dedicated outdoorsman. Committed to excellence, family, and craft.
Lead Instructor, STG | Military Veteran | Firearms
Scott spent 22 years in the U.S. Army Airborne Infantry, after retiring he began his next career in the Security field eventually teaching both the D and G Course. Scott is an NRA Certified Law Enforcement and Private Security Firearm Instructor for over 12 years.
D Course Expert | USMC Veteran | TSA Veteran
Ubaldo “Gunny” Cruz is a 22-year USMC veteran and former TSA officer specializing in Class D Security License training. With 8 years of experience as a certified security instructor, Gunny provides students with the practical skills and federal-level insights needed to excel in the private security
The operational backbone of STG, ensuring a seamless experience from enrollment to certification and beyond.
President, S2 institute
President, Invictus
Vice President, Invictus
Vice President, S2 Institute
Vice President of Operations, S2
Manager, STG
Director of Training, Invictus
President, S2 institute
President, Invictus
Vice President, Invictus
Vice President, S2 Institute
Vice President of Operations, S2
Manager, STG
Director of Training, Invictus
We are more than a training center. We are a career partner, dedicated to the highest standards of excellence in the security industry.
Learn from instructors with decorated careers in military and law enforcement, bringing real-world scenarios into every lesson.
We are more than a training center. We are a career partner, dedicated to the highest standards of excellence in the security industry.
We leverage our extensive network of security partners across Florida and beyond to help connect our graduates with employment opportunities.
Our curriculum is designed not just to meet, but to exceed the official State of Florida requirements for all security licenses.