Lieven Claessens has extensive experience with spatial analysis, integrated assessment and modelling of soil – landscape - land use systems. He is a co-developer of the LAPSUS modeling framework, a collection of spatially explicit landscape process simulation models (water erosion by runoff, tillage erosion and landsliding). LAPSUS has been explicitly linked to methodologies addressing ecological processes and land use change to assess interactions and feedback mechanisms between landscape, land use and landcover. In addition he has experience with crop growth simulation models, food security and yield gap assessment (www.yieldgap.org), digital soil mapping, integrated assessments of agricultural systems and land use change modeling (www.cluemodel.nl) with a focus on smallholder farming systems in Sub-Saharan Africa. Current research is focusing on interactions and feedback mechanisms between bio-physical and socio-economic processes from household to watershed and regional scale levels in the context of food security and sustainable intensification under climate change (www.agmip.org, www.yieldgap.org).