Subsurface Constructors is a full service deep foundation and ground improvement contractor headquartered in St. Louis, MO. Our team of geotechnical engineers, project managers and tradesmen specialize in geotechnical construction projects of all types. Our design capabilities and unique fleet of vibro rigs put us in a competitive position on stone column and aggregate pier projects all over the United States. Subsurface Constructors is a Veteran-Owned Small Business certified as Federal Government Contract-Ready.