- Associate Dean, Academic Affairs, Stanford University School of Medicine (2008 - 2014)
- Cancer Liaison Program Physician, American College of Surgeons Commission on Cancer Program (1997 - 2011)
- Chair, Committee on Student Promotion, Professionalism, and Performance, Stanford University School of Medicine (2007 - 2011)
- Chair, Faculty Senate, Stanford University Medical School Faculty Senate (2006 - 2008)
- Chief of General Surgery, Palo Alto Veterans Health Care System (1997 - Present)
- Director Global Surgery, Center for Innovation and Global Health: Stanford University (2011 - Present)
- Director of Clinical Surgery, Palo Alto Veterans Health Care System (2013 - Present)
- Editor in Chief, World Journal of Surgery (2024 - Present)
- Faculty Fellow, Center for Innovation and Global Health (2011 - Present)
- Govenor, American College of Surgeons (2008 - 2014)
- Honorary Professor, Barts and the London School of Medicine, Queen Mary University of London (2014 - 2020)
- President, American College of Surgeons, Northern CA Chapter (2008 - 2009)
- President, Pacific Coast Surgical Association (2022 - 2023)
- Professor Extraordinary, Center for Global Surgery, Department of Global Health. Stellenbosch University, South Africa (2023 - Present)
- Residency Site Director, Stanford University, PAVAHCS (2003 - Present)
- Secretary, American College of Surgeons (2022 - Present)
- Surgical Clerkship Director, Stanford University School of Medicine (2000 - 2008)
- Vice Chair Department of Surgery: Professional Development, Department of Surgery, Stanford University (2016 - 2023)
- Vice Chair Department of Surgery: Professional Development and Diversity, Department of Surgery, Stanford University (2016 - 2022)