Career
He is also involved in the Cross-Party Groups on Oil & Gas, Scots language, Nuclear Disarmament, Malawi and Tibet. Stewart has also lodged a number of motions in parliament in support of Votes at 16. Stewart made a speech in favour of same sex marriage on the 20th of November 2013 at the Scottish Parliament Stage 1 Debate on the Marriage and Civil Partnership (Scotland) Bill, in which he spoke about his experience of coming out as gay.
Before his election to the Scottish Parliament, he had served as a local councillor for over eleven years and served as Depute Leader of Aberdeen City Council.
As a councillor, he chaired the Finance and Resources Committee and the North East of Scotland"s Regional Transport Partnership, NESTRANS. He also served as the chair of the 3Rs Board.