1985-1986 Internship, General Surgery, University Health Center of Pittsburgh
1986-1993 Residency, General Surgery, University Health Center of Pittsburgh
1988-1991 Research Fellowship, International Resuscitation Research Center
1993-1994 Fellowship, Surgical Critical Care, University Health Center of Pittsburgh
1994-1999 Assistant Professor, Surgery, University of Pittsburgh School of Medicine
1994-1999 Assistant Professor, Anesthesiology/CCM, University of Pittsburgh School of Medicine (Secondary appointment)
1999-2005 Associate Professor, Surgery, University of Pittsburgh School of Medicine
1999-2002 Associate Professor, Anesthesiology/CCM, University of Pittsburgh School of Medicine (Secondary appointment)
2002-2008 Associate Professor, Critical Care Medicine, University of Pittsburgh School of Medicine (Secondary appointment)
2005-2008 Associate Professor with tenure, Surgery, University of Pittsburgh School of Medicine
2008-2009 Associate Professor with tenure, Critical Care Medicine, University of Pittsburgh School of Medicine
2008-2009 Associate Professor, Surgery, University of Pittsburgh School of Medicine (Secondary appointment)
2009-2014 Professor with tenure, Critical Care Medicine, University of Pittsburgh School of Medicine
2009-2014 Professor, Surgery, University of Pittsburgh School of Medicine (Secondary appointment)
2014-2014 Interim Visiting Assistant Professor of Surgery, University of Maryland School of Medicine
2014-2018 Professor of Surgery, University of Maryland School of Medicine (tenure track)
2018-present Professor of Surgery with tenure, University of Maryland School of Medicine
1994-1997 Attending Staff, Surgery and Critical Care, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
2000-2004 Consulting Staff, Critical Care Medicine, LifeCare Hospitals of Pittsburgh, Pittsburgh, Pennsylvania
1998-2005 Consulting Staff, Critical Care Medicine, Magee-Women’s Hospital, Pittsburgh, Pennsylvania
1994-2014 Attending Staff, Surgery and Critical Care, UPMC Presbyterian, Pittsburgh, Pennsylvania
1997-2014 Consulting Staff, Surgery and Critical Care, VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
2014-present Attending Staff, R Adams Cowley Shock Trauma Center of the University of Maryland Medical Center, Baltimore, MD
1994-1996 Co-director, Surgical Intensive Care Unit, Montefiore University Hospital
1996-1998 Co-director, Surgical Intensive Care Unit, Presbyterian University Hospital
1998-2008 Co-director, Trauma/Surgical Intensive Care Unit, UPMC Presbyterian
2008-2014 Director, Neurotrauma Intensive Care Unit, UPMC Presbyterian
2014-present Director, Surgical Intensive Care Unit, University of Maryland Medical Center
2016-present Director, Surgical Intermediate Care Unit, University of Maryland Medical Center