2014 to present, Associate Professor, Department of Molecular Medicine, Beckman Research Institute of City of Hope, Duarte, CA
2011 - 2014, Associate Professor, Department of Radiation Biology, Beckman Research Institute of City of Hope, Duarte, CA
2002 - 2011, Associate Professor, Division of Hematology and Oncology, Department of Medicine, Indianapolis, IN
2010 - present, Adjunct Associate Professor, Department of Medicinal Chemistry & Molecular Pharmacology, Purdue University, West Lafayette, IN
2002 - 2005, Adjunct Associate Professor, Department of Pharmacology and Experimental Therapeutics, University of Maryland School of Medicine, Baltimore, MD
2001 - present, Invited Professor, School of Medicine, Unversidad Centroccidental “Isandro Alvarado”
2000 - 2001, Affiliate Scientist, Los Alamos National Laboratory, Los Alamos, NM
1998 - 2002, Associate Professor, Department of Pharmacology and Experimental Therapeutics, The Greenebaum Cancer Center, and the Programs in Molecular and Cellular Biology, and Toxicology, University of Maryland School of Medicine, Baltimore, MD
1992 - 1997, Assistant Professor, Pharmaceutical Sciences Department, and the Programs in Molecular and Cellular Biology
Oncology and Toxicology, University of Maryland School of Pharmacy, Baltimore, MD
1989 - 1992, Research Assistant Professor, Pharmacology and Experimental Therapeutics, and the Programs in Molecular and Cellular Biology, Oncology and Toxicology, University of Maryland School of Medicine, Baltimore, MD
1985 - 1989, Senior Research Associate, Cell Biology Group, Worcester Foundation for Experimental Biology
1981 - 1982, Adjunct Assistant Professor, Marymount College
1980 - 1984, Postdoctoral Fellow, Department of Cell Biology, Albert Einstein College of Medicine
1980 - 1981, Adjunct Assistant Professor, Hunter College of the City University of New York
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