CASTLE SECURITY GROUP

Castle Security Group is a Maryland private investigative agency. Many of our private investigators are former police officers, police detectives or have military experience... Castle Security Group was established in 1981 by Frank Napfel. We have served some of the largest corporations, law firms and insurance companies in the country. We have taken a leading position in the movement to professionalize the investigative industry. Castle maintains active memberships in the American Society for Industrial Security, World Association of Detectives, Maryland Investigators and Security Association (MISA), and Professional Investigators Alliance of Maryland... Castle Security Group is dedicated to delivering superior service to our clients and ensuring that their investigative needs are not only met, but exceeded. We offer exceptional detective work while providing personalized and committed support.

Primary location: Baltimore United States