Douglas previously served as an Independent Unionist Member of the Northern Ireland Assembly (MLA) for East Londonderry from 1998 to 2003.
The son of William Douglas (Northern Ireland politician), he attended Strabane Agriculture College before working as a farmer.
He was elected to the council as an Ulster Unionist Party (UUP) member, but soon resigned in opposition to the Good Friday Agreement.
[1] In reference to his decision to run, Douglas said: "Though public service has been part of my life and upbringing, returning to Stormont has not been a burning ambition.
At the 2019 local elections, however, Douglas lost his seat to the Democratic Unionist Party (DUP) candidate.