| Regional Co-Editor, Crystallographic Reviews | 1984-1993 |
| Program Chairman, Pittsburgh Diffraction Conference | 1988 |
| President, Pittsburgh Diffraction Society | 1989 |
| Chairman Search Committee Member, Department of Biological Sciences, Univ. of Pittsburgh | 1989-1990 |
| University Research Council Member, University of Pittsburgh | 1989-1992 |
| Project Leader, Crystallography Program, Institute of Molecular Biology, Academia Sinica, ROC | 1990-1992 |
| Scientific Review Committee Member, Biophysical Chemistry Study Section, NIH | 1989-1993 |
| Chair, Faculty Search Committee, Department of Biochemistry and Molecular Biology, UGA | 1997 |
| Member, Task Group for the Evaluation of NASA's Biotechnology Facility for the International Space Station | 1999 |
| Co-Chair, Faculty Search Committee, Department of Biochemistry and Molecular Biology, UGA | 2001 |
| Member, Scientific Advisory Board, Institute of Molecular Biology, Taiwan, Republic of China | 1988-present |
| Co-Director, ACA Summer School in Crystallography, University of Pittsburgh | 1993-1996 |
| Director, ACA Summer School in Crystallography, University of Georgia | 1997-2002 |
| Chair, Founding Members, Southeast Regional Collaborative Access Team for Synchrotron beamlines at APS | 1997-1998 |
| Member, Scientific Advisory Board, Bruker AXS Inc. | 2002-present |
| Member, Scientific Advisory Board, Institute of Biochemistry, Taiwan, Republic of China | 2003-present |
| Member, University Research Computing Committee, University of Georgia | 2003-present |
| Member, Scientific Advisory Board, Institute of Biophysics, Chinese Academy of Science, China | 2004-present |
| Member, Committee of Visitors for the Evaluation of Life Science Program of the US Dept of Energy | 2005 |
| Member, Institute Laboratories Advisory Council, RIKEN Discovery Research Institute, Japan | 2005-present |
| Member, International Advisory Com., 2006 International Conference on Structural Genomics | 2005-present |
| Member, External Scientific Advisory Committee, Center for Eukaryotic Structural Genomics | 2005-present |
| Chair, Organizing Committee, 1st Annual UK-Southeast USA Symposium on Structural Genomics and Proteomics of Membrane and Metalloproteins | 2005-present |
| Coordinator (US), Global Initiative for Structural Proteomics (China, Japan, UK, USA) | 2005-present |
