| Dr. Matthew McLean | Univ. of Houston | PE Sciex | 1989-1990 |
| Dr. Kuangnan Qian | Univ. of Delaware | ExxonMobil Res. & Engr. Co., NJ | 1990-1991 |
| Dr. Zhenmin Liang | Ohio State Univ. | Hoffman LeRoche, New Jersey | 1992-1993 |
| Adnan A. Al-Hajii | Saudi Aramco | Dhahran, Saudi Arabia | 1994-1995 |
| Dr. Kathleen McCormack | Esso Resource Europe | Abingdon, England | 1995-1996 |
| Cynthia Newton | North Caroline A&T Univ. | 1992 | ||
| Stephanie L. Elmer | Univ. of Wisconsin, Madison | Univ. of Illinois, Urbana-Champaign | 2001 |