1986-1991 University of Pittsburgh Medical Center Assistant Professor of Pathology
1989-1998 University of Pittsburgh Medical Center Director of Immunocytochemistry
1990-1997 University of Pittsburgh Medical Center Director of Histology
1990-present University of Pittsburgh Medical Center Director
Division of Transplantation Pathology
1991-1997 University of Pittsburgh Medical Center Associate Professor of Pathology
1992-present Thomas E. Starzl Transplant Transplant Institute,
Pittsburgh, Pennsylvania
Executive Committee Member
1995-present University of Pittsburgh School of Medicine Associate Professor of Pathology
1995-present University of Pittsburgh School of Medicine,
Immunology, Cellular & Molecular Biology
Graduuate Faculty
1997-present University of Pittsburgh Medical Center Professor of Pathology
2002-2005 University of Pittsburgh
McGowan Institute for Regenerative Medicine
Member Faculty
2002-2005 University of Pittsburgh
Non-tenured Faculty Promotions & Appointments
Committee Member

Other Positions
1986-present Coordinator of post-transplant biopsy reliability NIDDK liver transplant database
1986-present Pathology coordinator to NIDDK liver transplant database
1990-1998 Pathology coordinator for multicenter trial of FK506 for primary allograft recipients
1990-1992 Hepatitis C viral genomes in hepatocellular carcinoma.
M. Gerber, M.D., Department of Pathology, Tulane University Medical Center; New Orleans, LA.
1991-1993 Liver xenograft analysis. B. Gridelli, University of Milan, Italy.
1994-1998 Pathology coordinator for multicenter U.S. Trial mycophenolic acid in liver transplantation - Syntex Corporation.
1994 Chair, Hepatic Allograft Rejection Panel, World Congresses of Gastroenterology, World-Wide Consensus Document, "Terminology for Hepatic Allograft Rejection"
1995-present Co-chairman, Third Banff Conference on Allograft Pathology; Chairman, Liver Session on World Consensus Document on Grading of Liver Allograft Rejection.
1995-1997 Moderator, Liver Pathology Specialty Conference
United States and Canadian Academy of Pathology
1995-2001 Member, Editorial Board of Xenotransplantation
1995-present Member, Editorial Board of Current Opinion in Organ Transplantation
1995-1997 Moderator, Liver Platform Presentations, United States and Canadian Academy of Pathology Annual Meeting, Washington, D.C.
1996-present Abstract Review Board United States and Canadian Academy of Pathology, Inc.
1997 Coordinator, Transplantation Pathology of the Liver and Other Abdominal Organs, International Academy of Pathology, Budapest, Hungary
1997-2002 Special Section Editor, Liver Transplantation and Surgery