2013. Je Landscapes of southern Brazil: Ecology, History and Power in a Transitional Landscape during the Late Holocene. AHRC (UK)-FAPESP (Brazil, Sao Paulo state). J. Iriarte with co-PIs Paulo DeBlasis (University of Sao Paulo) and Francis Mayle (University of Reading)
2011. Environmental impact of the Pre-Columbian 'geoglyph builders' in western Amazonia. National Geographic Society. The Global Exploration Fund – Northern Europe. With Francis Mayle (Department of Geosciences, University of Edinburgh), Mitchell Power (Department of Geography, University of Utah), Denise Schann (Universidade Federal do Para, Brazil).
2011. Investigating Pre-Columbian Landscape Transformation by the Late Holocene Megalithic Cultures of NE Amazonia. British Academy. Small Grants. J. Iriarte PI, with co-PIs: Francis Mayle (Department of Geosciences, University of Edinburgh), Mitchell Power (Department of Geography, University of Utah), Joao Saldanha and Mariana Petry Cabral (IEPA - Institute for Scientific and Technological Research of Amapa State, Brazil).
2010–2011. Sacred places and funerary rites: the longue durée of southern Jê monumental landscapes. International Collaborative Research Grant. Wenner-Gren Foundation for Anthropological Research. J. Iriarte and S. Copé, PIs with co-PIs Jami Lockhard (University of Arkansas), Michael Fradley (University of Exeter) and Christopher Gillam (University of South Carolina).
2010–2013. Pre-Columbian human impact in the Bolivian Amazon. Funded by the Leverhulme Trust. Co-Principle Investigator with Francis Mayle (Lead PI) (Department of Geosciences, University of Edinburgh), Heiko Prümers (German Institute of Archaeology) and Ian Woodhouse (Department of Geosciences, University of Edinburgh).
2010–2011. Sustainable raised-field agroecosystems for food security in the Bolivian Amazon. Project Development Grant Scheme (Interdisciplinary Networks), University of Exeter, Research and Knowledge Exchange Transfer. With Rolf Aalto, Andrew Nicholas, Luiz Aragão, Tim Quine and Ian Hartley (Department of Geography, University of Exeter), Michael Winter and Robert Fish (Department of Politics, University of Exeter).
2009–2010. Investigating the Socio-Political Organization of Early Formative Taquara/Itararé Societies: Regional Survey and Excavations in the Piray Mini Basin, Interior Atlantic Forest, Argentina. National Geographic Society. Committee for Research and Exploration.
2008–2010. Ecology and archaeology of the coastal savannas of French Guiana: landscapes co-constructed by man and nature? CNRS-France (Programme Amazonie- Phase II). Co-PI with Doyle McKey (Université Montpellier II, France), Stéphen Rostain (Archéologie des Amériques, UMR 8096 CNRS, France), and Bruno Glaser (Institute of Soil Science and Soil Geography, University of Bayreuth, Germany).