Qualified Presort Service, LLC began in 1984 with one full-time worker. Today, our new state of the art facility occupies over 45,000 square feet and we have over 100 dedicated, professionally trained employees. Qualified Presort Service is conveniently located adjacent to the USPS near the intersection of I-29 and I-90 in Sioux Falls, South Dakota. We are strategically located in the center of the heartland to enable us to have your mail delivered efficiently anywhere in the United States. Operating in Sioux Falls also enables us to work with the Sioux Falls Post Office, which is one of the most efficient Post Office locations in the United States.