Investigative Services: About Us
David Nagle – President and CEO
David Nagle is a licensed private investigator and has 25 years of experience in the security and law enforcement profession. He began his career as a security officer with Burns International Security Services in 1981. In 1984 he became a police officer and has worked for the City of Pittsburg, The Peralta District Police Department and the Contra Costa County Sheriff’s Office. In 1986 he founded D.N. Security Services. David also served as a military officer with the California Army National Guard from 1982 to 1994.
Mark Nagle – Vice President
Mark Nagle has been in the security field since 1989. Over the years Mark worked in Business Development, Finance, Human Resources, and Security Operations. Mark has a B.A. in Communications from San Francisco State University.
Debbie Nagle – Director of Administration
Debbie Nagle has been in the security field since 1998. Over the years Debbie has worked in Business Development, Finance, Human Resources, and Security Operations.
George King – Director of Operations
George King started in 1974 as a Manager-in-Training after college with Burns International Security Services. In 1990 He was the GM with Security Bureau Inc. In 1998 he was the GM for Burns International Security Services at the San Francisco office and managed a budget of $20M. In 2001 he was promoted to the Area Vice President for San Francisco/San Mateo and managed a budget of $50M. George has a B.A. Degree in Psychology with the University of California, Davis. He is also a United States Army Vietnam Veteran.
Jim Hyatt – Director of Investigations
Jim Hyatt is a licensed private investigator. Jim retired as police captain with 30 years of service with the Sausalito Police Department. His duties included the investigative commander, patrol commander, training manager, personnel and records management, disaster planning, detective, f/t to a major crimes task force, including liaison with Homeland Security. Jim has received thousands of hours of advanced training in a wide variety of fields from the California Commission on Peace Standards and Training. He is a graduate of the Federal Bureau of Investigation National Academy. Jim holds a degree from Golden Gate University in Administration of Justice.
Frank O’ Connor – Director of Business Development
Frank O’ Connor was a member of the Irish Police (Guarda Siochana) for 10 years, many of which were part of the Special Branch. Frank worked for Burns International Security Services in Business Development for many years out of the San Francisco Office.
Most of our clients are law firms, large corporations, financial investment firms and insurance companies.
PI License # 25120 PPO # 9700 Established 1986