2007 - Jorunn Bos and Maria Soledad Benitez
2006 - Angel Rebollar Alviter
Left to right: Mike Ellis, Angel Rebollar Alviter, Randy Rowe, and Larry Madden
2005 - Jessica S. Engle and Chatchawan Jantasuriyarat
2004 - Edgar Huitema and Samantha L. Thomas
2003 - Mizuho Nita and Lirong Zeng
2002 - Massimo Merighi and Gertrude A. Torto
2001 - Christian Andrew Wyenandt
2000 - Matthew S. Krause
1999 - J. Robert Fisher and Cerinda Loschinkohl
1998 - David Y. Han and William W. Turechek
1997 - Fikrettin Sahin
1996 - Alexandra G. Stone and Maria C. Sanchez-Cuevas
1995 - Deborah R. Hanmer
1994 - Marcella E. Grebus and Lydia I. Rivera-Vargas
1993 - Medani A. Omer
1992 - Robert Andy Hudson
1991 - Michael J. Boehm and Nilceu R. X. de Nazareno
1990 - Marie J. Anderson
1989 - Ravindra Bhat
1988 - Tony R. Joaquim
1987 - Weidong Chen
1986 - Timothy W. Bischoff