Ewing was educated at Edinburgh University and worked at Cambridge University in England, Monash University in Australia, Osgoode Hall in Canada, before joining the King's College London law school in 1992.
Ewing is recognised as a leading scholar in public law and labour law. His most recent work relates to reforming labour law to strengthen trade union freedom, constitutional reform, relating to public participation in the political process and the status of social and economic rights.
- 'What today's charter of workers' rights looks like' (31 January 2011) The Guardian
- A Manifesto for Labour Law (2016)
- The Bonfire of the Liberties (OUP 2010)
- (with AW Bradley) Constitutional and Administrative Law (Longman 2007)
- (with Samuel Issacharoff) Party Funding And Campaign Financing in International Perspective (2006) Columbia-London Law
- (with Hugh Collins and Aileen McColgan) Labour Law, Text, Cases and Materials (Hart 2005) ISBN 1-84113-362-0
- (with Tom Campbell and Adam Tomkins) Skeptical Essays on Human Rights (OUP 2002)
- (with Conor Gearty) The Struggle for Civil Liberties (OUP 2000)
- (with Conor Gearty) Freedom under Thatcher: Civil Liberties in Modern Britain (OUP 1990)
- Britain and the ILO (1989)
- The Funding of Political Parties in Britain (1987)
- King's Law School staff page