Dr. Nessler received his orthopedic training at the Rochester Mayo Clinic. He has a specialty practice in hip and knee joint replacement as well as revisions. Dr Nessler joined St. Cloud Orthopedic Association in 1991, and is a member of the American Academy of Orthopedic Surgeons as well as the American Association of Hip and Knee Surgeons. Dr. Nessler is a consultant for Stryker Orthopaedics, a world wide leader in implants. Currently, he consults in the development of new surgical technique, clinical testing of new implant designs as well as computer navigation. Dr. Nessler has developed a muscle-sparing dual incision hip replacement technique in conjunction with Stryker and now has done nearly 800 of these procedures. In July, 2004 computer assisted navigation was incorporated into his hip surgeries. Navigation in knee surgeries began in January 2005. In July, 2007 the St. Cloud Hospital was ranked as one of the top 100 hospitals for Orthopedic care with the Mayo Clinic and Abbott Northwestern the only other Minnesota hospitals selected in this field.