Completed training in medicine at San Carlos University in Guatemala between 1966 and 1975; training in pediatrics between 1975 and 1978, and training in neonatology between 1979 and 1981. Subsequently it received training in kangaroo mother care in Bogota, Colombia in 1988, perinatal epidemiology in CLAP/PAHO in 1989, clinical management of the lactation in Wellstar, California in 1991 and Integrated Management in Childhood Illness Infant (IMCI) in Miami, Florida in 1999. It worked as specialist in the neonatal intensive care unit between 1981 and 1993 and in private practice between 1979 and 1999. Subsequently it worked as consultant in INCAP/PAHO in projects of breast-feeding and micronutrients of 1991 to 1997.

• Worked as consultant in INCAP/PAHO in projects of breast-feeding and micronutrients from 1991 to 1997.
• Worked as regional consultant in neonatal IMCI for the Pan American Health Organization, since 2000 to date.
• Has been president of the Pediatric Association of Guatemala and of the Association of Perinatal and Neonatal Medicine in Guatemala, professor of neonatology and editor of the journal Guatemala Pediátrica from 1982 to 2001.
• Honorary Member of the Pediatric Association of Guatemala.
• Honorary Member of the Pediatrics Society of Dominican Republic.
• Founder of the Perinatal and Neonatal Association in Guatemala.
• Founder of the Central American Confederation of Neonatology Societies.
• Distinguished Visitor of the metropolitan Council of the Central District of Tegucigalpa, Honduras.
• Won 9 awards in research and received several recognitions fro his collaboration to the community and contributions to the well-being of children.
• Published 3 books of 'neonatology', 3 distance learning courses, 11 manuals on subjects related to the perinatology, 'neonatology' and breast-feeding, and seventy-nine projects of research on national and international journals.
• Participated as consultant in projects for Mother Care, PAHO, UNICEF, USAID, AIDS and UNDP.
• Given more than 120 conferences and 80 workshops fro health workers in different countries of Latin America.