2010-2011: Director, Data Analysis Unit, Statistical Center for HIV/AIDS Research and Prevention
2004-2009: Staff Scientist, Statistical Center for HIV/AIDS Research and Prevention.
2004: Bioinformatics Specialist, The Salk Institute, Plant Biology Laboratory.
2001-2003: Statistical Consultant, University of California, Los Angeles, Array Data Analysis Group, Department of Biostatistics.
2002: Research Assistant, University of California, Los Angeles, Department of Human Genetics and Department of Biostatistics.
2000-2002: Research Assistant, University of California, Los Angeles, Department of Biostatistics.
1999: Research Assistant, University of Texas at Austin, Department of Civil Engineering.