Jan’s interdisciplinary research explores engineering, as well as social, economic and management problems. His main areas of research include: collaborative, integrated and adaptive water resources management; participatory coupled human-water systems modeling as well as participatory social-ecological modeling; artificial intelligence applications in hydrology; sustainable agriculture; and water and food security. This interdisciplinary research has been conducted in over 30 countries in close collaboration with diverse stakeholders, including multiple projects in, for example, China (grassland degradation), Iran (water resources), Pakistan (soil salinity), Guatemala (food security), and the Arctic (water security). A particular focus of his recent research has been the development of approaches to improve the inclusiveness of stakeholder engagement processes and empowering marginalized communities (e.g., Indigenous communities) in water resources and agroecosystem modeling and management.