Sioux City: 712-252-5132

Serving the Tri-State Area

Certified Testing Services Inc - Logo

Storm Lake: 712-213-8378

Concrete Testing 2 Structural steels

Have high expectations for your construction project? Certified Testing Services Inc will ensure that your construction project undergoes precise planning, cautious design and rigorous execution. We will take all your specifications, schedules, and budgets into consideration.

Meeting the expectations of your construction project

Count on our industry-certified engineers to provide you with complete customer satisfaction. Call us today!

Sioux City



Storm Lake


Superior material testing to ensure the safety of your building

Comprehensive material testing solutions

Certified Testing Services Inc provides numerous types of material testing solutions and can design specialized tests to meet the unique needs of your project. Whether it's a simple residential property or a major power plant, we ensure that an accurate construction material testing is performed on your project.  

Exceptional construction material testing services