Dr. Collier is an Associate Professor of Sustainability Science in the School of Natural Sciences in Trinity College Dublin, where he is also Director of Research and a Principal Investigator in the Science Foundation Ireland ADAPT Centre. He was the coordinator and is now leading the high leveled advisory board of the Horizon 2020 nature-based solutions project Connecting Nature. He also has leading positions in two other EU nature-based solutions projects – GoGreenRoutes and ReNature. Marcus was the coordinator of the EU-funded TURAS FP7 project, for which he received a Champions of European Research Award. He has been awarded a prestigious European Research Council Consolidator grant for NovelEco, a citizen science project that has just commenced in June 2021. Marcus explores the human-nature interface and specialises in social-ecological systems thinking. He has diverse research interests but all focus on the complex and fascinating interface between social and ecological systems, especially scaling out nature-based solutions in an urbanizing world, and the potential of innovation and nature-based enterprises. Marcus has written extensively on contested issues such as novel ecosystems and nature-based solutions. As an environmental consultant, prior to entering academia, he worked with volunteers and non-governmental agencies to co-create and implement environmental projects through adaptive collaborative processes.