Over the past 42 years, GSE Construction has completed more than 1000 projects as a general engineering contractor. Our history of outstanding performance includes everything from building municipal water and wastewater infrastructure to private sector Design-Build enterprises using innovative treatment processes. State and federal agencies, public utility districts, national laboratories, and private industrial facilities have all benefited from our years of proven competency in all aspects of water and wastewater construction. Projects include retrofitting aging facilities, expanding plant capacity, replacing existing equipment, constructing storage tanks and pump stations, building anaerobic/aerobic treatment facilities, and bio-gas generation facilities.