He is an associate professor of energy systems modeling who created and leads development of the open-source tool Calliope. We have collaborated in the projects SEEDS, SENTINEL and JUSTWIND4ALL. In LIVEN2, he advises on developing our Calliope-Spain model and on the soft links between Calliope and ENBIOS, the group’s open-source socio-ecological assessment tool. He has hosted two of our PhD researchers, Alexander de Tomás and Miquel Sierra, during their research stays at TU Delft.