[1] Born in Weymouth, England to parents from Northern Ireland, Maguire and his family emigrated to Canada at four years old.
As a result, he grew up in foster care in the Halifax area and became a Canadian citizen when he was 16.
He worked in telecommunications and later became a sales representative and technician at the Halifax Water Commission.
[5] On February 23, 2021, Maguire was appointed to the Executive Council of Nova Scotia as Minister of Municipal Affairs.
[6] Maguire was re-elected in the 2021 election, however the Rankin Liberals lost government becoming the Official Opposition.