Ph.D., Department of Ecology and Evolution, State University of New York at Stony Brook, New York, USA. (1995) Licenciado en Biología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina. (1981) Louis Weintraub Professor of Biology, Department of Biological Sciences, The George Washington University, Washington, DC. Sept. 2012 – current Research Collaborator at the National Museum of Natural History, Smithsonian Institution, Washington , DC. Nov 2009 - current Louis Weintraub Associate Professor of Biology, Department of Biological Sciences, The George Washington University, Washington, DC. Sept 2009 – Aug 2012. Associate Professor, Graduate Program Chair (2004-2009) School of Biological Sciences, University of Nebraska-Lincoln. Aug 2003 – Aug 2009. Promoted to full Prof August 2009. Assistant Professor, School of Biological Sciences, University of Nebraska-Lincoln. 1997 – 2003. Postdoctoral Research Associate, Department of Genetics, University of Georgia, Athens, GA. (with J.C. Avise). Aug 1995 - Jul 1997. Graduate Student in Ecology and Evolution, SUNY at Stony Brook, Stony Brook, N.Y. (A. Meyer and M.A. Bell, advisors). 1988 - 1995.