Carlos Macellari is currently Director of Exploration for Tecpetrol. Since 2005 to 2012 was the Worldwide Director of Geology for Repsol Exporacion S.A. From 1999 to 2005 he was Vice President of Exploration and Business Development for Hocol S.A., based in Bogota, Colombia. From 1997 to 1999 had the position of General Manager for Latin America of Benton Oil & Gas Co, in Caracas, Venezuela. Before he held several positions in Shell as Senior Geologist, based in the USA and Holland. Dr. Macellari has a PhD and MsC from The Ohio State University and a Licenciado en Geologia degree from the Universidad de La Plata in Argentina. He has been a guest lecturer in many international forums, has published over 40 international scientific publications, and is the founder of the Journal of South American Earth Sciences.