Associate Professor, Johns Hopkins School of Medicine, Johns Hopkins University (past)
1992 - current
Assistant Professor, Johns Hopkins School of Medicine, Johns Hopkins University (past)
1985 - 1992
Assistant, Johns Hopkins School of Medicine, Johns Hopkins University (past)
1984 - 1985
Fellow, Johns Hopkins School of Medicine, Johns Hopkins University (past)
1982 - 1984
Resident, Johns Hopkins School of Medicine, Johns Hopkins University (past)
1980 - 1982
Branch Chief, hn456, National Human Genome Research Institute, National Institutes of Health (NIH) (past)