PRESENT:
- Superior Investigator, Researcher Career of the Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET).
From June 1st, 2003.
- Present Research Institution: "Centro de Estudios de Parásitos y Vectores" (Center for the Study of Parasites and Vectors), National University of La Plata. La Plata. Argentina. From December 2000 - present.
Previous positions:
- Principal Investigator, Researcher Career Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET). Research Institution: Laboratorio "Unit for the study of the ecology and reservoirs of parasites" Department of Biological Sciences, Schoof of Exact and Natural Sciences, University of Buenos Aires. October 1986 - June 2003.
- Faculty Associate. Lincoln Institute for Land Policy, Cambridge, Massachussetts, USA. June 1999 - August 2001.
- Environmental Consultant. Department of Research, University of Belgrano. July 1994 - August 2001.
- Full Professor, Part Time, Department of Economy, Saint Andrew University, San Isidro, Province of Buenos Aires; June 1990 - December 1992
- Full Professor, Part Time, Department of Biological Sciences, Schoof of Exact and Natural Sciences, University of Buenos Aires, Argentina; August 1984 - June 1990.
- Visiting Professor and Consultant, National Institute for Diagnosys and Research of Chagas Disease" Dr. Mario Fatala Chabén", (modelling and epidemiology in a WHO Program for Chagas Disease; August 1984 - March 1986.
In the Venezuelan Institute for Scientific Research (Caracas, Venezuela).
- Investigator (several categories) from January 1971 through February 1986.
- Visiting Researcher (Sabbatical Year), Institute of Animal Resource Ecology, University of British Columbia, Vancouver, Canada, October 1977 - October 1978.
- Associate Professor Part Time, School of Sciences, Central University of Venezuela, Caracas, Venezuela, March 1971 - March 1976.
- Associate Professor Part Time, School of Sciences, Central University of Venezuela, Caracas, Venezuela, September 1967 - December 1970.