Research Politech. Mexico, Merida, Yucatan, Cinvestav, 1980-1981. Consultant Environmental Impact, Mexico City, 1980-1981. Mining company executive Rofomex, S.A. de Curriculum Vitae, La Paz, Mexico, 1981-1983.
Consultant Analysts, Inc., Mexico City, since 1983. Research Inter-Disciplinary Marine Sciences Institute, Cicimar, La Paz, since 1983. Science affairs specialist state department United States Embassy, Mexico, 1986. cons.
Analyst urban ecosystems, University Utah Research Institute, 1986. Mexico Marine Military Forces, since 1983, Ministry of Fisheries, 1983, National Council of Scientific and Technology, Conacyt, 1984, Eco-ingenieria, S.A., 1985, Tecma, S.A., 1986, ERT, 1986, remote sensing urban ecosystems University Utah Research Institute. Seafood quality assurance University Texas Agricultural and Mechanical, 1987, Consultores En Ecosistemas, South Carolina, 1989, Union de Capitales, UNICA, 1990.