Subsurface Exploration Services

Our predecessor, STS Consultants, Ltd. (STS), provided more than 60 years of geotechnical and environmental drilling services throughout the Midwest.  In 2007, AECOM, Inc. purchased STS and continued all STS operations, including drilling services. However, during 2010, AECOM, Inc. decided to discontinue drilling services and sell all drilling equipment.

Following the sale of drilling equipment, Subsurface Exploration Services, LLC (SES), a new geotechnical and environmental drilling company, began operation on November 2, 2010.  SES is proud to follow the tradition of STS subsurface exploration, which includes:

• Over 100,000 completed geotechnical and environmental projects during the last
  60 years.

• Continuing subsurface exploration contract with the US Army of Corps of Engineers for the last 13 years.

• Subsurface investigation for foundations of several of the tallest buildings in the Midwest.