Medical Providers

All our providers are Department of Transportation (DOT) certified by the Federal Motor Carrier Safety Administration. All our physicians are certified Medical Review Officers (MRO’s).

John-McElligott, MD, FACP, MPH, Medical Director
Over 35 yrs experience in Occupational Medicine. Certified Medical Review Officer (MRO), Masters Degree (MPH) in Occupational Health and Safety, Appointed to the FMCSA-DOT Medical Work Committee, Member of American College of Occupational Medicine, Fellow in the American College of Physicians, Griffin Hospital Yale University School of Medicine Affiliate.
John McElligott MD FACP Curriculum Vitae
Andrew Sugantharaj, MD
From Knoxville, Andrew attended Wheaton College in Illinois. After some brief Post-graduate work at the University of Tennessee, he went to ETSU’s Quillen College of Medicine where he also did his residency training in Internal Medicine. Andrew began work as a critical care Hospitalist at the Methodist Medical Center in Oak Ridge and then at Tennova Turkey Creek. After another 11 years working as an Internist, he joined the team at Occupational Health Systems.
Ron Flowers, PA-C
Graduate of Duke University School of Medicine Physician Assistant Program, class of 1976. Assistant to the medical director at the Aluminum Company of America for 30 years.
Ronald Flowers, PA-C Curriculum Vitae
Heather Thompson, PA-C
Heather Thompson is a Physician Assistant at Occupational Health Systems, Inc. and the Clinical Operations Manager. She is a graduate of Debusk College of Osteopathic Medicine and has a wide range of experience, including Internal Medicine, Dermatology and Psychology. Heather is also a certified personal trainer and strength/conditioning coach. She coordinates with OHS clients to help in the implementation and conduction of their health and wellness programs. Heather is a member of the American Academy of Physician Assistants, Society of Dermatology Physician Assistants and the TN Academy of Physician Assistants.
Walt Blankenship, PA
Graduate of the University of Kentucky’s Masters of Physician Assistant Studies program, Walt worked for nearly a decade in the Emergency Departments of several area hospitals including the only Level 1 trauma center in the region. Walt holds a Bachelor’s Degree in Exercise Science and an Associate’s Degree in Respiratory Therapy from East Tennessee State University. He is a member of the Tennessee Association of Physician Assistants and joined Occupational Health Systems in the spring of 2018.

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