Senior Scientist or Principal Investigator

Instituto Nacional de Pesquisas da Amazonia

01 Aug 1995 - present

Graduate Student or Post Graduate

University of Hawai'i at Manoa, College of Tropical Agriculture and Human Resources, Department of Tropical Plant and Soil Sciences

01 Jan 1990 - 01 Jul 1995

Research or Laboratory Scientist

Instituto Nacional de Pesquisas da Amazonia

01 Jul 1986 - 01 Jul 1995

Research or Laboratory Scientist

Instituto Nacional de Pesquisas da Amazonia

01 Apr 1977 - 01 Jul 1986

Graduate Student or Post Graduate

Universidad de Costa Rica, Escuela de Biologia

01 Feb 1984 - 01 Jun 1986

Undergraduate Student

University of Connecticut, Department of Biology

01 Sep 1968 - 01 Jun 1973