Past affiliation(s) within the IAU

• Past President of Commission 9 Instruments (1991-1994)
• Past Vice-President of Commission 50 Protection of Existing & Potential Observatory Sites (1991-1994)
• Past Vice-President of Commission 9 Instruments (1988-1991)
• Past Organizing Committee Member of Commission 9 Instruments (1994-1997)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (1994-1997)
• Past Organizing Committee Member of Commission 9 Instruments (1985-1988)
• Past Organizing Committee Member of Commission 9 Instruments (1982-1985)
• Past Member of Division B Facilities, Technologies and Data Science
• Past Member of Division E Sun and Heliosphere
• Past Member of Commission 9 Instruments
• Past Member of Division II Sun & Heliosphere (until 2012)
• Past Member of Division XII Union-Wide Activities (until 2012)
• Past Member of Commission 12 Solar Radiation & Structure (until 2012)
• Past Member of Commission 50 Protection of Existing & Potential Observatory Sites (until 2012)