Terradyne is a leading provider of geotechnical & environmental engineering, construction materials testing and civil site design services. With seven offices in California, Colorado and Texas, we have completed projects of all sizes throughout the United States.Specialties: Geotechnical EngineeringEnvironmental EngineeringConstruction Materials TestingTerradyne has completed projects in California, Arizona, Colorado, Wyoming, Oklahoma, Texas, Arkansas, Louisiana, Mississippi, Pennsylvania, Virginia, West Virginia and Maryland.