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Linda D. Derringer, BS - President  & Managing Partner

Linda has over 30 years of Occupational Medicine experience. She started OSN to better the communication & coordination between employers, medical practitioners, and legal counsel. 


Linda is a relationships expert and always available to her clients, partners and staff.  Known as the brain trust with her bi-annual “Journal Clubs”, these events involve a dine and learn atmosphere with presentations on current topics relating to the medical review and workers compensation industry

Associate Medical Directors

Donato J. Borrillo, M.D., J.D., M.S. 
Associate Medical Director

Dr. Borrillo is a practicing physician, attorney, scientist, pilot and decorated war veteran.  He is a sought after expert in medical and scientific causation. 


Dr. Borrillo has crafted theories in many prominent national legal cases on both defense and plaintiff sides. Having been associated with OSN since 2005,


Dr. Borrillo is also the key member of the on-demand services.

Ronald G. Hawes, M.D. 
Associate Medical Director

In addition to being a Navy veteran, Dr. Hawes is a practicing physician since 1970. 


He has such accolades in Demonstrating Patient Interactions in Characteristics of a Humane Clinician, Physician of the Year, and Noteworthy Achievement. 


Dr. Hawes is a current practitioner with Summa Health System and Akron General Hospitals / Cleveland Clinic, while also being a key member to OSN since 2002.

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