Sebastian has over 15 years of experience conducting research and providing GIS consulting services in the fields of agronomy, agroecology and natural resource management, both domestically and in international settings. He is interested in the application of advanced statistics and geospatial technologies in environmental analysis. At Stone, Sebastian supports agrochemical fate and exposure projects as well as environmental risk assessments. He holds a PhD in Plant and Soil Science from the University of Vermont. In his dissertation, Sebastian studied soil fertility patterns, nutrient use efficiency and ecosystem services in coffee landscapes of Costa Rica.