- Professor and Chief, Division of Transplant and Hepatobiliary Surgery
- Director, UI Hospitals & Clinics Organ Transplant Center
- Professor of Surgery–Transplant and Hepatobiliary Surgery
- Surgical Director of Kidney, Pancreas, and Living Donor Transplant
- Professor of Surgery - Transplantation and Hepatobiliary Surgery
- Fellowship Director, Abdominal Organ Transplant Surgery Fellowship
- Associate Professor of Surgery–Transplantation and Hepatobiliary Surgery
- Surgical Director Transplant, Iowa City VA Hospital
- Clinical Professor of Surgery–Transplantation and Hepatobiliary Surgery
- Surgical Director of Liver Transplant
- Clinical Assistant Professor - Surgery