Past affiliation(s) within the IAU

• Past President of Commission 25 Astronomical Photometry and Polarimetry (1979-1982)
• Past Vice-President of Commission 25 Astronomical Photometry and Polarimetry (1976-1979)
• Past Organizing Committee Member of Commission 25 Astronomical Photometry and Polarimetry (2000-2003)
• Past Organizing Committee Member of Commission 25 Astronomical Photometry and Polarimetry (1997-2000)
• Past Organizing Committee Member of Commission 25 Astronomical Photometry and Polarimetry (1982-1985)
• Past Organizing Committee Member of Commission 28 Galaxies (1982-1985)
• Past Organizing Committee Member of Commission 28 Galaxies (1979-1982)
• Past Organizing Committee Member of Commission 25 Astronomical Photometry and Polarimetry (1973-1976)
• Past Member of Division B Facilities, Technologies and Data Science (until 2018)
• Past Member of Division C Education, Outreach and Heritage (until 2018)
• Past Member of Division G Stars and Stellar Physics (until 2018)
• Past Member of Division J Galaxies and Cosmology (until 2018)
• Past Member of Commission 25 Astronomical Photometry and Polarimetry (until 2015)
• Past Member of Commission 27 Variable Stars (until 2015)
• Past Member of Commission 28 Galaxies (until 2015)
• Past Member of Commission 41 History of Astronomy (2003-2015)
• Past Member of Division V Variable Stars (until 2012)
• Past Member of Division VIII Galaxies & the Universe (until 2012)
• Past Member of Division IX Optical & Infrared Techniques (until 2012)