Knox trains as an architect at Edinburgh College of Art in Scotland from 1963 to 1967 and Heriot-Watt University in Edinburgh from 1967 to 1968, and works as an architect before establishing himself as a cartoonist. He works in animation from 1970 to 1975 for Halas & Batchelor in London, Potterton Productions in Montreal, and Kotopoulis Productions in Toronto. He then joins Red Weekly and Socialist Challenge as a political cartoonist, as well as contributing to various children’s comics for IPC Media from 1975 to 1988.
Knox signs much of his political work “Blotski,” and he and Republican News cartoonist Brian Moore, better known as “Cormac,” work together as “Kormski,” drawing the anti-clerical strip “Dog Collars” for Fortnight magazine. Since 1989 he has been the editorial cartoonist for The Irish News, a nationalist newspaper based in Belfast. Since 1996 he has contributed the “As I See It” feature to Hearts and Minds on BBC2 Northern Ireland. From 1997 to 1998 he is political cartoonist for Ireland on Sunday.
Downey’s offbeat reports of the 1994 FIFA World Cup for The Irish News are subsequently compiled for his first book, Just One Big Party. He spends six years as a BBC news producer in Derry and Belfast, before joining the Derry News as editor in 2001. During his period as editor (2001–2004), the Derry News wins two Newspaper Society awards for Fastest Circulation Growth in the United Kingdom.
Since 2004, Downey has published six comic novels set in the criminal underbelly of post-ceasefire Ireland. His books have been described as “a superb blend of comedy, political dirty tricks, grisly murder and bizarre twists.”
A former deputy-president of the Union of Students in Ireland, Downey is one of the organisers of a student occupation of government offices in Dublin on Budget Day 1988 in protest against education cutbacks.
In 2006, Downey helps establish the new Northern Ireland literary review Verbal and edits the publication for its first six issues.
A lifelong political anorak, in 2007, Downey works as an election pundit for TV3 (Ireland), alongside the Irish comedian Brendan O’Carroll. In 2010, he wins a contest to predict the winners of Northern Ireland’s 18 Westminster constituencies, missing out on just one, Naomi Long, who surprisingly beat First MinisterPeter Robinson in Belfast East. He donates his prize, a framed Ian Knox cartoon, to Long by way of apology.
Downey’s 2010 comedy-thriller The American Envoy is the first novel issued by an Irish publishing house as a Kindlee-book, simultaneously with its paperback release.
In June 2011, Downey is appointed Director of Media for Culture Company 2013, the body tasked with delivering Derry’s UK City of Culture year.
Downey is married to Una McNally, and they have two children.