Past affiliation(s) within the IAU

• Past President of Commission 36 Theory of Stellar Atmospheres (1997-2000)
• Past Vice-President of Commission 36 Theory of Stellar Atmospheres (1994-1997)
• Past Organizing Committee Member of Commission 36 Theory of Stellar Atmospheres (2000-2003)
• Past Organizing Committee Member of Division IV Stars (1997-2000)
• Past Organizing Committee Member of Commission 36 Theory of Stellar Atmospheres (1991-1994)
• Past Member of Commission 10 Solar Activity (until 2015)
• Past Member of Commission 29 Stellar Spectra (until 2015)
• Past Member of Commission 36 Theory of Stellar Atmospheres (until 2015)
• Past Member of Division II Sun & Heliosphere (until 2012)
• Past Member of Division IV Stars (until 2012)