He was previously a student leader, president of the Fédération étudiante collégiale du Québec, who played a key role in organizing the 2012 Quebec student protests.
In the 2007 election at age 22, Diamond became the youngest member ever elected to the Quebec legislature, a record he held until the 2012 election of Léo Bureau-Blouin; the previous recordholders had been André Boisclair and Claude Charron.
Federal Bureau of Investigation | Leo Tolstoy | Shanghai Railway Bureau | Pope Leo XIII | Bureau of Land Management | Central Bureau of Investigation | Bureau of Alcohol, Tobacco, Firearms and Explosives | Bureau of Indian Affairs | United States Census Bureau | Leo Gorcey | Leo Burnett | Leo Brouwer | United States Bureau of Reclamation | Bureau of Meteorology | Leo VI the Wise | Leo | Pope Leo X | Leo Durocher | Citizens Advice Bureau | Better Business Bureau | Wuhan Railway Bureau | Wadada Leo Smith | Ted Leo | Pope Leo I | Federal Bureau of Prisons | Pope Leo IX | Melissa Leo | Leo Carrillo | Bureau of Engraving and Printing | Ted Leo and the Pharmacists |