Undersheriff Michael W. Donovan Jr. runs the law enforcement division of the Monmouth County Sheriff's Office. Under his command, Undersheriff Donovan is in charge of 110 sworn law enforcement personnel and 30 civilian employees.

The Sheriff's Office law enforcement division consists of a warrants division and fugitive task force, a detective and criminal investigations bureau, a court security unit, a civil process unit, a canine unit, the transportation and implementation of youth detention services to Middlesex County and a records bureau.

Undersheriff Donovan has more than 30 years of experience in law enforcement. He spent 23 years at the Monmouth County Prosecutor's Office retiring as a lieutenant and 7 years with the Neptune City Police Department. While at the prosecutor's office, Undersheriff Donovan was responsible for the investigations of major crimes, internal affairs, narcotic law violations as well as other violations of the criminal justice system.

Undersheriff Donovan received his Bachelor of Science degree from Thomas Edison State College in Administration of Justice and has attended the prestigious Federal Bureau of Investigation National Academy.