Career
He also served as the Social Democratic and Labour Party (Social Democratic and Labour Party) spokesman on Health, Social Services and Public safety and Policing, and was appointed to the Policing Board in May 2011. He became the Social Democratic and Labour Party Director of Communications in November 1996 until December 1999, a time that included the negotiations leading to the Good Friday Agreement and first Assembly elections. He left the Social Democratic and Labour Party to work as customer relations manager of Viridian Group Public Limited Company, then owners of Northern Ireland Electricity.
Following the establishment of the power-sharing Northern Ireland Executive, McDevitt served as Special Adviser to the Minister for Agriculture and Rural Development, Bríd Rodgers.
He was involved in the attempts to resolve the Drumcree conflict and advised Rodgers during the 2001 United Kingdom foot-and-mouth outbreak. He was selected as the new Social Democratic and Labour Party Modern Language Association for South Belfast on 9 December 2009 and succeeded Carmel Hanna in the Northern Ireland Assembly in early 2010.
On Thursday, 17 May 2012, McDevitt launched a consultation seeking views on a reduction in speed limits from 30 mph to 20 mph on designated unclassified roads. McDevitt said the Social Democratic and Labour Party was "100%" behind moves to permit same-sex marriage, but caused controversy by saying two veteran councillors would be disciplined over their opposition to lieutenant
In September 2013 he resigned as an Modern Language Association after he had not declared some payments received while working as an Modern Language Association.
Born in Dublin, Ireland, but brought up in Malaga, Andalusia, Spain, McDevitt was educated at the Instituto Bachillerato Mixto, Fuengirola.
He lectures occasionally on public affairs and public relations. His blog was a source of commentary on economic and political issues in Ireland.