of Parliament (1988–1993) James Jerome, member of Parliament (1968–1979) and Speaker of the House of Commons (1974–1979) David Lametti, member of Parliament (2015–present) and Minister of Justice and Attorney General of Canada (2019–present) Laurier LaPierre, historian and Senator from Ontario (2001–2004) Mark MacGuigan, academic, politician, and judicial figure Paul Martin Sr., diplomat and member of Parliament (1935–1974) Paul Martin, 21st Prime Minister of Canada (2003–2006) Catherine McKenna, member of Parliament (2015–2021), Minister of Environment and Climate Change (2015–2019), and Minister of Infrastructure and Communities (2019–2021) Marilou McPhedran, Senator from Manitoba (2016–present) Joe Mihevc, Toronto City Councillor (1998–2018) David Mulroney, diplomat and national foreign policy advisor, Canadian Ambassador to China (2009–2012) . Also served as president of St Michael's College Thomas Mulvey, diplomat and Under-Secretary of State for Canada (1909–1933) Fabian O'Dea, lawyer and Lieutenant Governor of Newfoundland (1963–1969) John Raymond O'Neill, member of Parliament (1925–1926) Gordon Osbaldeston, civil servant and government administrator Gérard Pelletier, journalist and member of Parliament (1965–1975) Edmond Proulx, lawyer and member of Parliament (1904–1921) and member of the Legislative Assembly of Ontario (1923–1929) Ian Scott, lawyer and member of the Legislative Assembly of Ontario (1985–1992) Greg Sorbara, member of the Legislative Assembly of Ontario (1985-1995, 2001-2012) Elizabeth Joan Smith, politician, Solicitor General of Ontario, and member of the Legislative Assembly of Ontario (1985–1990) Filomena Tassi, member of Parliament (2015–present) and Cabinet member Jim Wilson, politician and member of the Legislative Assembly of Ontario (1990–2022) Health, science, and medicine Nancy Olivieri, medical researcher and haematologist Mark Siddall, biologist Dr. Andy Smith, president and CEO of Sunnybrook Health Sciences Centre and professor of surgery at the University of Toronto Faculty of Medicine Law and judicial figures John Casey, judge on the New York Court of Appeals Gerald Francis Day, justice of the Ontario Court of Justice (1992–1999) and Ontario Superior Court of Justice (1999–2008) Martha M. Devlin, justice of the Supreme Court of British Columbia Kathleen O'Connor Diesman, judge on the Judicial Council of California Guy P. DiTomaso, judge on the Ontario Superior Court of Justice for Simcoe County, Ontario John Joseph Dowlin, judge on the Ontario Superior Court of Justice for Kent County, Ontario (appointed 1904) John Edward Eberle, justice of the Ontario Court of Justice (1977–1990) and the Ontario Superior Court of Justice (1990–1994) Harry Edmondstone, judge on the Ontario Court of Justice John James Fitzpatrick, justice on the Ontario Superior Court of Justice (1982–1989) Michael