Technical field(s) of expertise: Ecosystem services valuation (mainly economic valuation); PSE schemes; ESP Chair for Costa Rica; ESP Co-Chair for Central America; IPBES lead author; IUCN CEM-Ecosystem Services member; Future Earth contributor Marcello is Costa Rican, he has a Bachelors Degree in Industrial Engineering, a Masters in Science in Biodiversity, Wildlife and Ecosystem Health from the University of Edinburgh, and a Masters in Environmental Management from the Interamerican University of Costa Rica. He also has advanced studies in Biology with an emphasis on Sustainable Development from the Latin University of Costa Rica. He is currently a PhD Scholar at the Australian National University under the supervision of Robert Costanza. His research focuses on the development of an alternative financial mechanism to the current payment for ecosystems services program of Costa Rica. He is also working on the national economic valuation of ecosystem services in Costa Rica (present and future) and the calculation of the Genuine Progress Indicator of the same country. Marcello is a lead author for IPBES in the regional assessment for America, in which he coordinates de section on climate change and ecosystem services. He is the Co-chair for Central America of the Ecosystem Services Partnership. He is also currently works as international consultant on sustainable development in topics such as natural capital, corporate biodiversity management and climate change. Marcello is currently a research fellow at the International Center of Economic Policy of the National University of Costa Rica, and he also teaches at Long Island University (campus in Costa Rica) in the Global Studies Program. He has been a lecturer at the University for the International Cooperation in the Masters Degree on Sustainable Business Management, and at the Latin University of Costa Rica in the Masters Degree on Environmental Management. He currently also works as conservation photographer, trained by photographers from National Geographic and specialized in projects on sustainable development. His recent clients include Holcim, United Nations and IUCN. Marcello is a Climate Leader trained by Al Gore. He has given Mr. Gore's presentation more than 40 times in several countries, with a total audience of 2,000 people.