Lawrence W. Mulvey a decorated veteran of the Nassau County Police Department with 28 years of police experience was appointed Nassau County 's 12 th Commissioner of Police on July 1, 2007.

During his career with the Nassau County Police Department, Commissioner Mulvey spent 11 years in uniform patrol and rose through the ranks, serving in narcotics, auto crime and as Hostage Negotiations Team Leader. Before he retired from the Nassau County Police Department in 2001, with the rank of Inspector, Commissioner Mulvey also served as an assistant to the Police Commissioner, representing the department in all matters pending before the Nassau County Legislature and he was the department's liaison to the County Executive 's office.

After retiring from the Nassau County Police Department, Commissioner Mulvey served as security site manager at the United States mission to the United Nations. He also co-founded a private security-consulting firm, Executive Protection Strategies LLS, based in Westbury. Most recently, he has worked as a security contractor to the Homeland Security Department (FPS/ICE), in New York .

Commissioner Mulvey received a bachelor's degree in Criminal Justice from John Jay College of Criminal Justice, and a master's degree in Criminal Justice from Long Island University 's C.W. Post campus. Furthermore, he attended the FBI National Academy in Quantico , Virginia and is an FBI Certified Hostage Negotiator and a New York State Certified Police Instructor. Moreover, he has served as an adjunct professor of Criminal Justice at Molloy College and at LIU.

Commissioner Mulvey is a lifelong Nassau County resident, and lives in Westbury with his wife, with whom he has college-age twin daughters.