Frank J. Napfel III
Frank Napfel is the founder of Castle Security Group. He was a Supervisor with the Baltimore City Police Department prior to entering the private sector. He also served on the adjunct faculty of the University of Baltimore, after receiving his master's degree in the field of Criminal Justice from that institution in 1977. Frank is a past President of the Maryland Investigators & Security Association, and a former director of the Maryland Association of Contract Guard Agencies. He is also a member of the American Society for Industrial Security. Frank has been declared an expert by the courts in public safety and security as well as corporate and industrial security. He also was on the adjunct faculty at the Community College of Baltimore County for six years.

Joseph Comma
Joseph Comma has worked with Castle for the past seven years after serving for a decade as an officer and detective in the Baltimore Police Department. Assigned to several federal and multi-jurisdictional Task Forces, Joe became adept at mobile surveillance and the use of electronic tracking devices. Joe has provided effective testimony in numerous child custody and family law matters

Steve Tabeling
Steve Tabeling has been involved in law enforcement as Commander of a Homicide Unit, Chief of Police, Associate Professor at several universities and Director of Security at a leading University. With 60 credits beyond his Masters Degree from Loyola College, Steve has served on the faculty of five institutions of higher learning. As a recognized expert in probable cause, Steve's recent assignment involved teaching that concept to all members of the police academy of the Baltimore Police Department, from which he retired as a Lieutenant.

Paul Bressler III
Paul Bressler has been an   investigator with Castle since 1991. His areas of expertise include in-depth background and locate investigations, along with surveillance. Paul has worked both as an undercover and street investigator and has worked on an international level. Paul has been awarded an Honorary Gold Record by the Recording Industry Association of America for his efforts to combat sound recording piracy.

Jerry A. Van Der Meulen
Jerry Van Der Meulen joined Castle Security Group after retiring from the Baltimore City Police Department at the rank of Lieutenant. During his thirty-five years of service, Jerry has coordinated the operations of the drug squad, flex squad and the foot patrol units with a primary focus on street-level drug and gang investigations. Jerry’s responsibilities also included coordinating security with the United States Secret Service for the President, Vice President and the First Lady during local visits.

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