Past affiliation(s) within the IAU

• Past President of Commission 46 Astronomy Education & Development (2000-2003)
• Past President of Commission 50 Protection of Existing & Potential Observatory Sites (1994-1997)
• Past Vice-President of Commission 46 Astronomy Education & Development (1997-2000)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (2006-2009)
• Past Organizing Committee Member of Commission 46 Astronomy Education & Development (2003-2006)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (2003-2006)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (2000-2003)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (1997-2000)
• Past Organizing Committee Member of Commission 46 Astronomy Education & Development (1994-1997)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (1991-1994)
• Past Organizing Committee Member of Commission 46 Astronomy Education & Development (1991-1994)
• Past Organizing Committee Member of Commission 50 Protection of Existing & Potential Observatory Sites (1991-1994)
• Past Organizing Committee Member of Commission 46 Astronomy Education & Development (1988-1991)
• Past Member of Commission 6 Astronomical Telegrams
• Past Member of Commission 15 Physical Study of Comets & Minor Planets
• Past Member of Commission 20 Positions & Motions of Minor Planets, Comets & Satellites
• Past Member of Commission 33 Structure & Dynamics of the Galactic System
• Past Member of Commission 34 Interstellar Matter
• Past Member of Commission 46 Astronomy Education & Development (2003-2006)
• Past Member of Commission 50 Protection of Existing & Potential Observatory Sites (2003-2006)
• Past Member of Commission 50 Protection of Existing & Potential Observatory Sites (1994-1997)
• Past Member of Resolutions Committee (1991-1994)