Analytical & Diagnostic Solutions, LLC, 704 4th St W, Apt 2, Brookings, SD 57006, US

Formed in 1988, GeoTek Engineering & Testing Services Inc. is a professional services firm. Based in Sioux Falls, S.D., it provides consulting services in the areas, including geotechnical engineering, construction materials testing and environmental consulting. The company serves a number of clients across South Dakota, North Dakota, Iowa, Minnesota and Nebraska. It offers a wide range of services, such as subsurface exploration, laboratory testing, as well as earth structures, slopes and retaining systems, among others. GeoTek Engineering & Testing Services Inc. is also one of the leaders in the field of geotechnical engineering.