B. Thayer Associates is a multi-disciplined consulting firm organized into four major divisions: Engineering, Architecture, Landscape Architecture, and Land Surveying. Integrated into these major divisions are specialized services that include civil, structural, and site design; bridge and highway design; construction phase services; arborist services; wetland delineation and mitigation; and environmental and permitting services. Founded in 1990 and located on Long Island, B. Thayer Associates is a certified Women-Owned Business Enterprise (WBE) and Disadvantaged Business Enterprise (DBE).