Town Clerk Donna McCoy swears in Lt. John Zarro to the position of lieutenant.

BILLERICA — Chief Roy Frost is pleased to share that the Billerica Police Department recently promoted Lt. John Zarro from the position of sergeant.

Lt. Zarro has been with Billerica Police since 1994, having joined after spending two years working as a campus police officer at the Wentworth Institute of Technology.

Zarro made sergeant in 2004. He has served as the department’s Records Bureau commander, as a firearms instructor, as a field training officer, and as a patrol sergeant on the overnight shift.

Lt. Zarro has a Bachelor’s Degree in Criminal Justice from Salem State College, and a Master’s Degree in Criminal Justice from Anna Maria College.

Lt. Zarro grew up in Billerica and graduated from Billerica Memorial High School. He lives in Wilmington with his wife Susan. The couple have six children, and John’s oldest son, Thomas Zarro, works for Burlington Police.

The promotion took effect on Saturday, Dec. 3.

“Lt. Zarro has been a professional and extremely productive member of our department for nearly 30 years now, and I am sure he will continue to excel as a lieutenant,” said Chief Frost.

Billerica Police commanders stand with Lt. John Zarro following Zarro’s swearing in. From left are Lt. Robert Beloin, Deputy Chief Jerry Roche, Chief Roy Frost, Lt. Zarro, Lt Commander Ron Balboni, Sgt. Andy Devito and Town Manager John Curran.