Oscar has been a member of the Red Cross Red Crescent Movement in the Americas, Europe, Asia/Pacific and Middle East for many years. He has worked in different posisitons for National Societies, the International Federation and the ICRC. Among other publications, he participated in 1994 in the elaboration of the most important First Aid manual and Tropical Diseases in Spanish.

Currently he dedicates his time to train humanitarian workers, to develop online courses and to create different educational tools in order to improve the volunteering work worldwide and the capacity building activities at local level.