'During my chairmanship at USX and U.S. Steel corporations, Dr. Prezzia’s expertise enabled us to both favorably impact our OSHA record-keeping statistics going forward and reduce unnecessary medical expenses while insuring the highest quality of medical care for our employees."

Thomas J. Usher, Chairman, Marathon Oil Corporation  and Past-Chairman, USX and U.S. Steel Corporation


'Dr. Prezzia and I-DOhC have been invaluable to Elliott Group’s progress to world-class excellence in health and safety"

Michelle McGregor-Smith, Director - Health, Safety, Environmental and Quality Assurance, Elliott Group


"Dr. Prezzia provided valuable insight and expertise in assisting Marathon occupational medical clinics in our pursuit of the highest standards of clinical and professional expertise."

Dr. Brian J. Linder, MD, MPH, Chief Medical Officer of Marathon Oil Corporation


"Dr. Prezzia's expertise and 24/7 availability were invaluable in our achieving a year-to-date 71% reduction in OSHA recordable incidents, 76% reduction in OSHA DART, and 99% reduction in workers' compensation costs compared to last year."    

Chris Matarrese, Safety & Environmental Manager, Farmland Foods Inc. Arnold, Pa. facility

I-DOhC clients include ATI-Allegheny Ludlum, Marathon Oil, Elliott Group, CorVel Corporation, CompServices, Inc., and WPAHS-Allegheny Valley Hospital HealthWorks.