Guy Giorno

Guy Giorno (born 1965) is a Canadian lawyer and conservative political activist. Giorno was Chief of Staff to then Premier of Ontario Mike Harris. In 2002 he joined the Toronto office of the Fasken Martineau DuMoulin law firm. On July 1, 2008, Giorno succeeded Ian Brodie as Chief of Staff in the Prime Minister's Office of Canadian Prime Minister Stephen Harper. He returned to Fasken Martineau effective January 1, 2011, and was replaced as Chief of Staff by Nigel S. Wright. He is a fellow at the University of Toronto School of Public Policy & Governance.

In January 2011 he was appointed National Campaign Chair of the Conservative Party's re-election effort.