1. Dr. Arthur E. Weis, Ph.D. University of Illinois (1981-1984)
2. Dr. Kenneth D. McCrea, Ph.D. Purdue University (1982-1988)
3. Dr. Ann F. Johnson, Ph.D. University of California, Davis (1983-1987)
4. Dr. James K. Nitao, Ph.D. University of Illinois (1987-1988)
5. Dr. Gwendolyn L. Waring, Ph.D. Northern Arizona University (1988)
6. Dr. Michael R. Sackschewsky, Ph.D. Washington State University (1988)
7. Dr. John D. Horner, Ph.D. University of New Mexico (1988-1990)
8. Dr. Timothy P. Craig, Ph.D. Northern Arizona University (1989-1990)
9. Dr. Joanne K. Itami, Ph.D. Northern Arizona University (1989-1990)
10. Dr. Anantanarayanan Raman, Ph.D. Fulbright Scholar Univ. of Madras (1990-1991)
11. Dr. Jonathan M. Brown, Ph.D. Michigan State University (1991-1994)
12. Dr. George Melika, C.Sc. Ukrainian Academy of Science (1994-1996)
13. Dr. György Csóka, C.Sc. Hungarian Academy of Sciences, Hungary (1995)
14. Dr. James T. Cronin, Ph.D. Florida State University (1995-1997)
15. Dr. Micky D. Eubanks, Ph.D. University of Maryland (1997-1998)
16. Dr. Amy V. Whipple, Ph.D. University of California, Davis (1998-2002)
17. Dr. Shellee A. Morehead, Ph.D. University of Utah (1999-2001)
18. Dr. Jason T. Irwin, Ph.D. Miami University, Ohio (2002-2004)
19. Dr. Michael J. Wise, Ph.D. Duke University (2003-2008)
20. Dr. Netta Dorchin, Ph.D. University of Tel Aviv (2005-2007)
21. Dr. Mizuki Takahashi, Ph.D. University of Memphis (2008-2011)