Past affiliation(s) within the IAU

• Past Vice-President of Executive Committee (1976-1979)
• Past Vice-President of Executive Committee (1973-1976)
• Past President of Commission 45 Stellar Classification (1967-1970)
• Past President of Commission 30 Radial Velocities (1961-1964)
• Past President of Commission 30 Radial Velocities (1958-1961)
• Past Vice-President of Commission 45 Stellar Classification (1964-1967)
• Past Chair of Finance Committee (1961-1964)
• Past Organizing Committee Member of Commission 45 Stellar Classification (1970-1973)
• Past Organizing Committee Member of Commission 30 Radial Velocities (1964-1967)
• Past Member of Commission 30 Radial Velocities
• Past Member of Commission 33 Structure & Dynamics of the Galactic System
• Past Member of Commission 45 Stellar Classification
• Past Member of Finance Committee (1967-1970)
• Past Member of Finance Committee (1964-1967)
• Past Member of Special Nominating Committee (1961-1964)