Resources for design and construction

  • 0

    Soil Borings

  • 1

    Soil Density Testing

  • 2

    Emergency Spill Response

  • 3

    Mold Testing

  • 4

    Staff - 20th Anniversary

GeoTek Engineering & Testing Services, Inc. is a privately owned corporation formed in 1988 and based in Sioux Falls, South Dakota. GeoTek has concentrated on maintaining a staff of qualified and experienced personnel. This includes registered professional engineers, certified professional geologists, and certified industrial hygienists with more than 15 years of experience. The engineering project managers are supported by experienced drill crews, technicians, scientists, and administrative staff.

The company provides professional services in the areas of:


GeoTek serves the Midwest states of South Dakota, North Dakota, Minnesota, Iowa, and Nebraska. Our service area is generally concentrated within a 200 mile radius of Sioux Falls, including the major towns of Aberdeen, Brookings, Huron, Madison, Mitchell, Pierre, Vermillion, Watertown, Yankton, Marshall, Worthington, Sioux City, LeMars, Spirit Lake, Spencer, Fort Dodge, Carroll, Boone, Norfolk, South Sioux City, O'Neill, Fargo, and Wahpeton. Our coverage, however, has no finite boundary. GeoTek has served the region from Rapid City, South Dakota to Duluth, Minnesota and from Lincoln, Nebraska to Dickinson, North Dakota.