-Medical Internist, Stamford Hospital, 2003-present
-Deputy Commissioner for Medical and Scientific Affairs, FDA, 2005-2007
-Resident Fellow, American Enterprise Institute, 2004-2005
-Senior Adviser to the Administrator, CMS, 2004
-Director of Medical Policy Development, FDA, 2004
-Senior Adviser for Medical Technology to the FDA Commissioner, 2003-2004
-Columnist, Forbes.com, 2007-present
-Author, Forbes-Gottlieb Medical Technology Report, 2004-2005
-Staff Writer, British Medical Journal, 1997-2005
-Author, Gilder Biotech Report, 2000-2002
-Senior Editor, Pulse, Journal of the American Medical Association, 1996-2001
-Health Care Analyst, Alex Brown & Sons (investment bank), 1994-1995