Born in 1934  and educated at Queen's University Belfast, he was ordained in 1963. After curacies at Ballymacarrett and Knock he became Central Adviser on Christian Stewardship to the Church of Ireland. Later he was Rector of St Brendan’s, East Belfast and then Archdeacon of Down. From 1980 to 1986 he was Bishop of Clogher; and from then to 1997, Bishop of Down and Dromore. McMullan was elected to Down and Dromore in 1986 and resigned in January 1997.
- Amongst others he wrote "A Cross and Beyond", 1976; "Everyday Discipleship", 1979; "Reflections on St Mark’s Gospel", 1984; "Growing Together in Prayer", 1990; "Opposing Violence/Building Bridges", 1996; and "The Story of Saint Martin’s Church and the Southern Church Mission to Ballymacarrett", 2008 British Library website accessed 15:12 GMT 1 February 2011
- Who's Who 2008: London, A & C Black, 2008 ISBN 978-0-7136-8555-8
- Crockford's Clerical Directory 1975-76 London: Oxford University Press, 1976 ISBN 0-19-200008-X
- "Diocese bids farewell to bishop". Church of Ireland. 13 January 1997. Retrieved 4 August 2009.
|Bishop of Clogher
|Bishop of Down and Dromore
|This biography of an Irish religious figure is a stub. You can help Wikipedia by expanding it.|
|This article about an Anglican bishop is a stub. You can help Wikipedia by expanding it.|