| International Mathematical Olympiad Committee | - | , ex-officio | |
| Education Committee | 1986 - 1987 | ||
| Education Committee | 1987 - 1989 | , served as chair | |
| Education Committee | 1989 - 1992 | , ex-officio | |
| Crux Mathematicorum Editors-in-Chief | 1991 - 1995 | ||
| Board of Directors | 1993 - 1997 |
