2004 - present, Medical monitor, bone marrow transplant network, CIBMTR
2003 - present, Member, Donor and patient safety monitoring committee, NMDP
2001 - 2005, Stem Cell Committee, American Association of Blood Bank
2000 - present, Special consultant in Hematologic malignancies for the Center for Drug Evaluation and Research, Food And Drug Administration
2000 - 2005, Member, Institutional Review Board, National Marrow Donor Program
1996 - present, American Society of Bone Marrow Transplant
1996 - 2000, Member, Board of Directors, J.P. McCarthy Foundation (Myelodysplastic syndromes)
1996 - 2000, Human Investigation Committee, Wayne State University Medical School
1995 - present, International Society of Hematotherapy and Graft Engineering
1995 - 2000, Member, Michigan Medicare Advisory Committee
1995 - 2000, Member, Board of Directors for Michigan Hematology-Oncology Society (MHOS)
1994 - 2000, Venous access Device committee, Harper Hospital
1992 - present, American Society of Clinical Oncologists
1992 - 2000, Southwest Oncology Group women's health committee
1991 – 2000, Transfusion Committee, Harper Hospital
1987 - present, Fellow of American College of Physicians
1987 - present, American Association of Blood Bank
1984 - present, American Society of Hematology
1984 - 2000, Infection Control Committee, Harper Hospital
1984 - 1992, American College of Physicians
1984 - 1991, Michigan Society of Transplantation
1983 - 2000, Principal Investigator and member of the Leukemia Working Group and bone marrow transplant committee, Southwest Oncology Group.
1981 - 1983, Established HLA Platelet Donor Bank with Southeastern Michigan Red Cross and served in HLA Platelet Executive Committee at Southeastern Michigan Red Cross
1980 - 2000, Southwest Oncology Group (Leukemia, Lymphoma, Multiple Myeloma and Bone Marrow Transplant)
1973 - 1975, American College of Physicians (Associate Member)
1971 - present, Thai Medical Association