Horsley Witten Group, Inc. is a full-service environmental science and engineering firm with offices located in Sandwich and ... Boston, Massachusetts, Exeter, New Hampshire, Providence, Rhode Island, and St. Croix, USVI. The firm was incorporated in 1988 and consists of a professional staff of over fifty engineers, surveyors, hydrogeologists, hydrologists, wetlands scientists, geologists, computer modelers, land use planners, environmental analysts, licensed site professionals and supporting personnel. The Horsley Witten Group specializes in providing consulting services in sustainable development techniques, site design, coastal and watershed protection, hydrology, hydrogeology, engineering, land use regulation, and technical information transfer and training. Our clients include government agencies at the federal, state, tribal, regional, county, and municipal levels, as well as private sector organizations, non-profit organizations and individuals. read more