1990 - 1991
Pathologie, Universitätsspital Zürich
1991 - 1994
Innere Medizin, Universtitätsspital Zürich
1994 - 1995
Innere Medizin, Mount Sinai Hospital, New York
1995 - 1998
Gastroenterologie und Hepatologie, Mount Sinai Medical Center, New York
1998 - 2001
Institut für Gentherapie und Molekulare Medizin, Mount Sinai Medical Center, New York
2002
Assistant Professor of Medicine, Mount Sinai School of Medicine, New York
2001 - 2002
Innere Medizin, Gastroenterologie, Mount Sinai Hospital and Mount Sinai School of Medicine, New York
2006
bis dato Adjunct Assistant Professor of Medicine, Mount Sinai School of Medicine, New York
2002 - 2006
Innere Medizin, Gastroenterologie und Hepatologie, Mount Sinai Hospital and Mount Sinai School of Medicine
2003 - 2006
Medizinischer Direktor, Intestinal Transplantation and Rehabilitation, The Recanati/Miller Transplantation Institute, Mount
Sinai Medical Center