Director policy United States Public Health Service, Washington, 1990—1992, department director, 1992, assistant director national Acquired Immune Deficiency Syndrome policy office, 1992—1993. Director health science policy Institute Medicine National Academy of Sciences, 1993—1998. Deputy director Tulane/Xavier Center Bio-Environmental Research, New Orleans, 1998—2003.
Executive director leadership alliance, clinical professor community health Brown University, Providence, since 2004. Consultant National Institutes of Health, Fairfax County Schools.