J. Tomás, has been participating in national and European projects on sea turtle and cetacean conservation since 1995; having worked with 6 of the 7 sea turtle species in studies on nesting beaches, feeding ecology, parasitology, migratory behaviour, genetics, anthropogenic threats, and interaction of these species with fisheries in Spain and other countries: Cyprus, Costa Rica, Equatorial Guinea, Greece, Dominican Republic, Uruguay and Cameroon. JT is author and co-author of more than 90 scientific publications, about 200 communications presented at conferences, several books, book chapters and informative publications, most of them on sea turtles. JT has been a member of the IUCN Marine Turtle Specialist Group since 2004 and was an elected member of the Board of Directors (2012-2015), Nomination Committee (2017-2021), and Award Committee (2022-present, chair from 2024) of the International Sea Turtle Society. He has participated in more than 30 projects and contracts for research and conservation of sea turtles and other threatened marine vertebrates, such as the project “Cambios a largo plazo en la abundancia poblacional y Ecología de la tortuga boba (Caretta caretta) en el Mediterráneo occidental” (CGL2011-30413 Ministerio de Ciencia e Innovación. Plan Nacional I+D+I 2008-2011) for the years 2012-2014, or the European projects INDICIT (2017-2019) and INDICIT II (2019-2022) on the use of sea turtles and biota as an indicator of the level of marine pollution, the MEDSEALITTER project (Interreg EU), and the LIFE-MEDTURTLES project (2019-2024). Currently JT is coordinating the teams attending the nesting events of the loggerhead sea turtle nesting in beaches of the Valencia region.