About Us

Material Testing Services (MTS) is a locally owned and operated geotechnical, environmental and construction materials engineering firm, with offices in Minot and Williston, North Dakota. MTS was founded in 1990 by John and Andrea Kleven to meet the need of our growing State and community’s need for professional engineering services. In 1998, MTS was sold to employees Steven Wald and Kelly Krebsbach. MTS currently employs a staff of professional engineers, geologists, scientists, technicians, drilling personnel, technical assistants and support staff. MTS serves clients primarily in North Dakota, South Dakota and Montana.


Communication and understanding our client’s needs, along with providing accurate technical information within a cost-efficient, safe and timely manner is our mission. We believe that the growth and reputation of our company are the direct results of the individual efforts and commitment of all of our employees. Our future success depends on continuing this commitment and adhering to the highest professional standards and ideals.

MTS has provided services on thousands of projects ranging from single family residences to multi-million dollar industrial complexes. MTS works with both public and private clients including:

  • Local, State and Federal Government Agencies
  • Military Agencies
  • Public and Private Utilities
  • Major Industries and Manufacturers
  • Architects and Engineers
  • Banks and Financial Lending Institutions
  • Contractors and Private Developers
  • Retail and Commercial Institutions

MTS is proud of our ability to meet the demands of any project, anywhere. Through the efforts of our dedicated staff, we approach each assignment, no matter how large or small, with enthusiasm and the full resources of our company.