Robert J. Cronin is a full time Deputy Sheriff commanding a regional Marine Unit. Mr. Cronin has over twenty-seven years of professional, full time law enforcement experience. His experience ranges from teaching boating safety classes to the general public to teaching for the Massachusetts Harbormaster’s Academy, including investigative techniques, patrol procedure, and watercraft accident reconstruction courses. Prior to becoming the Assistant Deputy Superintendent commanding the Marine Unit, Mr. Cronin was a Police Officer with the Town of Andover, Massachusetts. He was assigned as the Agency’s Safety Officer, for over fifteen years and the lead investigator in numerous traffic homicide cases.

Mr. Cronin’s career is based on a strong investigative foundation. Named to the Detective Division in 1986, he began to amass the skills required of an investigator, learning techniques in crime scene and case management. Upon completion of this assignment, Mr. Cronin was appointed Safety Officer in 1991. This assignment saw the Safety Officer position transform into a unique duty assignment. This position required interfacing with other Agencies on local, state and federal levels as they relate to various projects and investigations. This also included Mr. Cronin’s duties as the Agency’s “Crash Reconstrutionist” as well as a member of the North Eastern Massachusetts Law Enforcement Council Crash Reconstruction Unit.

A 100-ton United States Coast Guard licensed Master; Mr. Cronin has combined his experience and education as a Reconstructionist with his maritime experience making him a distinctively qualified expert in the area of watercraft collision and reconstruction.

Mr. Cronin also has extensive experience testifying in district and superior courts in both criminal and civil actions and has also given testimony before the Massachusetts Great and General Court.