Founded in 1923, O&G Industries Inc. is one of the largest construction materials and services company in the Northeast. The company offers a wide range of services, such as building construction and heavy civil construction, including roads, bridges, and water and wastewater treatment facilities. Based in Danbury, Conn., it has memberships with various associations, such as the American Society of Landscape Architects (ASLA), National Asphalt Pavement Association (NAPA), American Institute of Architects (AIA) and United States Green Building Council (USGBC), to name a few.