Established in 1880, Sewall Forestry & Natural Resource Consulting (SFNR) is the oldest forestry consulting firm in North America. SFNR serves private and public clients on five continents and is recognized globally as a leader in forest resource valuation and analysis, forest inventory planning & execution, forest modeling, purchase due diligence, litigation support, geographic information system technical support and other forestry and natural resource consulting. Our team of licensed professional appraisers, biometricians, foresters and GIS experts are ready to meet with you today.