Political career
In the 2019 Northern Ireland local elections, Mason was elected to the Newry, Mourne and Down District Council as a Councillor of the district electoral area (DEA) of Slieve Croob, winning 1,069 first preference votes and being elected on the fifth count.[2] Mason became Chairperson of the Council on 1st June 2021.[3]
Mason was elected to the Northern Ireland Assembly from South Down in the 2022 election, receiving 9,963 first preference votes and being elected on the first count.[4]