The County of Dukes County is comprised of Martha's Vineyard, Nomans Island and the Elizabeth Islands, and includes the towns of Aquinnah, Chilmark, Edgartown, Gosnold, Oak Bluffs, Tisbury, and West Tisbury. The year round population is about 17,000 - increasing to over 100,000 in the summer season.
Sheriff McCormack summered on Martha's Vineyard in his youth, and thirty years ago he brought his bride to Martha's Vineyard to show her the Island that he always loved. He became an officer for the Oak Bluffs Police Department before catching the attention of retired Sheriff, Christopher S. Look, Jr., who hired him to work at the jail. Sheriff McCormack worked his way through the ranks to become Special Sheriff, a position he held for twelve years prior to his election.
As the county's chief law enforcement officer, Sheriff McCormack is responsible for the administration of the regional lockup, the Jail & House of Correction, the Communications Center, (providing emergency 9-1-1 and emergency communication to all police, fire, and EMS agencies), the Community Corrections Center, the Drug Information Bureau, (including DARE, TRIAD, PROJECT LIFESAVER and other prevention programs), the intermittent Police Officer Academy, the patrol of Norton Point and Joseph Sylvia State Beaches, the Marine Division, and the Civil Process Division.
Sheriff McCormack remains active in the community and has been on the personnel boards of various island towns, was a long time treasurer on the board of the Martha's Vineyard Youth Hockey program, and is currently Vice-President for the board of directors of the Martha's Vineyard Arena. He lives in the town of West Tisbury with his wife MaryLee, his son Shawn, a graduate of Skidmore College, his son Steven, a graduate of St. Michael's College, and his daughter Michelle, who will be a junior at Emory University.