Joel is a Hydrogeologist with +30 years experience, graduated at the Mexican National Polytechnic Mexico (Geologist Engineer), has an MSc and PhD (Hydrogeology) from London University, UK. His professional experience includes Argentina, Australia, Colombia, Cuba, Mexico and Morocco. Joel has authored and co-authored, internationally, articles, books and chapters in books; is lecturer and researcher in the Earth Sciences and Geography postgraduate programmes (*UNAM, Mexico). Joel has been external expert for the IAEA, the European Commission, and Advisor of the LVII Mexican Congress; he carries out courses and seminars on groundwater flow systems in Latin-American countries.