Member faculty department city and regional planning Cornell University, Ithaca, New York, since 1967, director program on international studies in planning, 1970-1995, chair department city and regional planning, 1983-1988. Director undergraduate program, member graduate fields City and Regional Planning, Urban Studies, Public policy, Regional Science, Latin American Studies, International Development, member economic faculty University Cartegena, Colombia, 1973. Member architectural faculty University Andes and University Javeriana, Bogota, Colombia, 1973.
Instructor short course on regional development college engineering University Guatemala/Organisation American States, Guatemala City, 1975. Member faculty graduate school economics University Brasília and Federal University Ceara, Fortaleza.