Alfredo Arellano-Guillermo is regional director of protected areas in the Yucatán Península, Mexico. Additionally since 1994 is responsible of Sian Ka'an Biosphere Reserve, World Heritage Site. Prior to this, from 1990 to 1994, he was head of department for the Yucatán State Natural Protected Areas System. He has also conducted research and served as natural resources management Coordinator for Monarca A.C. Between 1984 and 1987, he conducted research on biology and conservation of the monarch butterfly with UNAM-University of Florida, and was a technical assistant on population dynamic research at UNAM. He has authored scientific paper and participated in conferences, workshops and the design of planning instruments for natural protected areas and eco-tourism.

A.A. Guillermo has a bachelor's degree in biology from UNAM, where he also completed a course on planning management of natural protected areas. In 1990, he participated in a course on coastal resource management with IFIAS-CINVESTAV.