Sioux City: 712-252-5132

Serving the Tri-State Area

Certified Testing Services Inc - Logo

Storm Lake: 712-213-8378

Sioux Falls

Phone: 712-252-5132

 

Fax: 712-252-0110

 

Our Office:

Certified Testing Services Inc

419 W 6th Street

Sioux City, IA 51102

 

Mailing Address:

PO Box 1193

Sioux City, IA 51102

 

Business Hours:

Monday - Friday: 7:00 AM - 5:00 PM

 

Please see our staff page for names and descriptions of the employees at our Sioux City, IA office.

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Stop by or call our Sioux City office today

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