Past affiliation(s) within the IAU

• Past President of Executive Committee (1985-1988)
• Past President Elect of Executive Committee (1982-1985)
• Past Vice-President of Executive Committee (1970-1973)
• Past Vice-President of Executive Committee (1967-1970)
• Past Advisor of Executive Committee (1988-1991)
• Past President of Commission 38 Exchange of Astronomers (1991-1994)
• Past President of Commission 29 Stellar Spectra (1964-1967)
• Past Vice-President of Commission 38 Exchange of Astronomers (1988-1991)
• Past Chair of Special Nominating Committee (1985-1988)
• Past Advisor of Special Nominating Committee (1988-1991)
• Past Organizing Committee Member of Division V Variable Stars (2006-2009)
• Past Organizing Committee Member of Division V Variable Stars (2003-2006)
• Past Organizing Committee Member of Division V Variable Stars (2000-2003)
• Past Organizing Committee Member of Division V Variable Stars (1997-2000)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1994-1997)
• Past Organizing Committee Member of Commission 30 Radial Velocities (1982-1985)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1982-1985)
• Past Organizing Committee Member of Commission 30 Radial Velocities (1979-1982)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1979-1982)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1976-1979)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1973-1976)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1970-1973)
• Past Organizing Committee Member of Commission 29 Stellar Spectra (1967-1970)
• Past Organizing Committee Member of Commission 38 Exchange of Astronomers (1967-1970)
• Past Organizing Committee Member of Commission 29 Stellar Spectra (1961-1964)
• Past Member of Commission 30 Radial Velocities
• Past Member of Commission 38 Exchange of Astronomers
• Past Member of Division IV Stars (until 2012)
• Past Member of Division V Variable Stars (until 2012)
• Past Member of Division XI Space & High Energy Astrophysics (until 2012)
• Past Member of Division XII Union-Wide Activities (until 2012)
• Past Member of Commission 29 Stellar Spectra (until 2012)
• Past Member of Commission 42 Close Binary Stars (until 2012)
• Past Member of Commission 44 Space & High Energy Astrophysics (until 2012)
• Past Member of Commission 46 Astronomy Education & Development (until 2012)
• Past Member of Resolutions Committee (1994-1997)
• Past Member of Special Nominating Committee (1961-1964)