Our team of physicians are specially trained, credentialed experts who provide thorough exams and objective reports.  TSOH physicians are independent consultants who specialize in their areas of medical discipline and are committed to providing the highest quality service to our examinees, clients, and consulting sources.

Dr. Joseph Erpelding, M.D.

Orthopedic Surgeon

Joseph Erpelding, M.D., grew up in Great Falls, Montana, and has dedicated more than 20 years to private practice in Billings, Montana. In addition to his private practice, he is an independent medical evaluator for Treasure State Occupational Health. He earned his undergraduate degree from the U.S Military Academy, West Point. He is a graduate of the WAMI program at the University of Washington School of Medicine. He completed his surgical internship and residency at the Madigan Army Medical Center. Dr. Erpelding retired from the U.S Army as a Lieutenant Colonel. During his 23 years of service he served as the Orthopedic Surgery Residency Program Director, Orthopedic Surgeon for Joint Special Operations Command and remains a member of the U.S Army Flight Surgeon’s Association. Additionally, he is a recipient of the Chairman of the Joint Chiefs of Staff’s Award for Excellence in Military Medicine/Research and the U.S Army Surgeon General’s Award for Excellence in Medicine. Dr Erpelding has served as the Chief of Orthopedic Department at St. Vincent Healthcare in Billings and as President and Executive Director of the Society of Military Orthopaedic Surgeons as well as the Board of Councilors for the American Academy of Orthopedic Surgeons.

Dr. Donald Ericksen, M.D.

Orthopedic Surgeon

Donald Ericksen, MD, is a board-certified orthopedic surgeon who has practiced in Montana for over twenty years. He has provided treatment and surgery for a wide range of orthopedic injuries and conditions. His practice has included sports medicine, joint replacement, fracture care and reconstructions of the knee, shoulder as well as foot and ankle. Dr. Ericksen completed medical school at the University of Washington School of Medicine in Seattle. His post graduate training included an internship in general surgery at Loyola University in Chicago, residency in orthopedic surgery at the University of Washington and an advanced fellowship in foot and ankle surgery at Harborview Medical Center in Seattle.

Dr. David J. Hewitt, M.D., M.P.H.,D.A.B.T

Occupational & Preventative Medicine, Toxicology

Dr. Hewitt is board certified in occupational medicine, general preventative medicine, and toxicology with over 25 years of consulting experience. As an occupational medicine physician he has training and expertise in treating work-related injuries and illnesses, musculoskeletal injuries, and providing case management for facilitation of early return to work for injured workers. Due to his background as both a private and public health consultant in environmental epidemiology and toxicology, he has unique expertise in assessing health claims related to biological and chemical exposures.

Dr. Albert D. Olszewski, M.D.

Orthopedic Surgeon

Albert Olszewski, M.D. was born and raised in Great Falls, MT and attended Carroll College followed by the University of Washington School of Medicine and completed his General Surgery and Orthopedic Residency at Wilford Hall Medical Center in San Antonio, TX.  In 1995 he completed a Sports Medicine Fellowship at University of Texas Health Science Center. Dr Olszewski then served in the Air Force and held the positions of Flight Surgeon, Chief of Flight, Training Officer, Orthopedic Surgeon for Mobile Surgical Field Team and Teaching Chief of Staff for the Department of Orthopedics at Lackland AFB. Dr. Olszewski has been in private practice as an Orthopedic Surgeon at Flathead Valley Orthopedics for over 20 years. He was a scientific coordinator for the Montana Orthopedic Society and a clinical consultant for Stryker Orthopedics. In addition, he has served on the Advisory Board for The Doctors Company. Dr. Olszewski is a healthcare policy expert and advocate.

Dr. Royce G. Pyette, M.D.

Occupational Medicine, Sports Medicine

Royce G. Pyette, M.D., graduated from Montana State University before attending the University of Washington Medical School. He completed specialty training at the University of Utah and Family and Preventive Medicine Program where he served as chief resident. He was employed at Bridger Orthopedic and Sports Medicine in Bozeman, Montana, from 2002-2013 where his practice included Sports Medicine, Orthopedic Surgical Assisting, Spinal Care and Occupational Medicine. Dr Pyette has been a U.S Ski and Snowboard Team Physician since 2001 and is the Medical Director for an International Mountain Guiding Company. Dr. Pyette’s current medical practice focus is performing Impairment Ratings and Closing Exams.

Dr. Daniel Rodriguez, M.D.


Daniel Rodriguez, M.D., is board certified with the American Board of Psychiatry and Neurology. He graduated from the University of Mississippi School of Medicine and the Louisiana State University School of Medicine Residency Program. He completed his fellowship training at the Department of Neurology, Washington School of Medicine in St Louis, Missouri, in Cerebrovascular Disease. He worked as a staff Neurologist at Billings Clinic and is employed as a Staff Neurologist at the Montana VA Health Care System. Dr. Rodriguez is able to take on all types of general Neurology cases including traumatic brain injury, nerve trauma, amputations migraines, and memory loss.

Dr. William Domarad, D.O.


William Domarad, D.O., is board certified in Neurology and Clinical Neurophysiology by the American Board of Psychiatry and Neurology.  He is a master certified independent medical examiner (MCIME) by the American Board of Independent Medical Examiners.  He graduated from the University of Osteopathic Medicine and Health Sciences/Des Moines University, and then completed his internship and residency in neurology at St. Louis University Hospitals and Clinics.  After residency, he completed his fellowship in clinical neurophysiology at the University of Illinois at Chicago.  He has experience in hospital and outpatient settings, including Workers Compensation disability claims.  He is an independent contractor who also has experience with his own private practice and continues to work clinically with licensure throughout multiple states. He holds an Honorable Discharge from the Unites States Army.