Assistant Professor, Department of Biology,  Sonoma State University                                     1998-present

Research Associate, Romberg Tiburon Center for Environmental Research,

    San Francisco State University                                                                                                      1996-1998

Research Associate, Center for Population Biology, UC Davis                                                  1996-1997

Research Assistant, Dept. of Biology, University of California, Los Angeles                            1991-1995

Teaching Assistant, Dept. of Biology, University of California, Los Angeles                            1989-1995