Past affiliation(s) within the IAU

• Past President of Commission 26 Double & Multiple Stars (1991-1994)
• Past Vice-President of Commission 26 Double & Multiple Stars (1988-1991)
• Past Vice-President of Commission 30 Radial Velocities (1967-1970)
• Past Organizing Committee Member of Commission 5 Documentation & Astronomical Data (1994-1997)
• Past Organizing Committee Member of Commission 26 Double & Multiple Stars (1994-1997)
• Past Organizing Committee Member of Commission 26 Double & Multiple Stars (1985-1988)
• Past Member of Division A Fundamental Astronomy (until 2022)
• Past Member of Division B Facilities, Technologies and Data Science (until 2022)
• Past Member of Division C Education, Outreach and Heritage (until 2022)
• Past Member of Division G Stars and Stellar Physics (until 2022)
• Past Member of Division H Interstellar Matter and Local Universe (2015-2022)
• Past Member of Commission G1 Binary and Multiple Star Systems (2015-2022)
• Past Member of Commission G3 Stellar Evolution (2015-2022)
• Past Member of Inter-Division G-H-J Commission Stellar Clusters (2015-2022)
• Past Member of Division G WG Active B Stars (until 2022)
• Past Member of Commission 5 Documentation & Astronomical Data (until 2015)
• Past Member of Commission 26 Double & Multiple Stars (until 2015)
• Past Member of Commission 29 Stellar Spectra (until 2015)
• Past Member of Commission 30 Radial Velocities (until 2015)
• Past Member of Commission 41 History of Astronomy (2003-2015)
• Past Member of Division IV Stars (until 2012)
• Past Member of Division IX Optical & Infrared Techniques (until 2012)
• Past Member of Division XII Union-Wide Activities (until 2012)
• Past Member of Special Nominating Committee (1991-1994)