GeoSystems Engineering, Inc., is a privately owned consulting firm specializing in geotechnical engineering, construction materials testing, environmental engineering, and water resources services. Larry D. Mullins, P.E., a geotechnical engineer in practice since 1972, originally formed the business in 1993 as Geotechnical Systems Engineering, Inc. (GSE). In order to expand our services and to better meet our clients’ geotechnical needs, GSE merged with SES Geotechnical, Inc., in July 2000, to form GeoSystems Engineering, Inc.