The Team
WorkCare is proud of its diversity in leadership. Our well-rounded team of seasoned executives boasts a breadth of experience from a variety of backgrounds including communications, public relations, information technology, insurance and client relations. Working in tandem with our expert physician staff, our goal is to provide our clients with excellent customer service.
Physician Bios
Peter P. Greaney, M.D., President
Dr. Greaney is the company president and CEO of WorkCare. He is board-certified in occupational medicine and family practice and is a specialist in toxicology.
He has been formally trained in the specialty of occupational and environmental medicine at the Southern Occupational Health Center at the University of California, Irvine, where he is currently a faculty member. He is also on the clinical faculty of the University of Southern California.
Dr. Greaney has designed occupational medicine programs for a variety of companies and serves as a corporate medical director consultant to numerous national companies, ranging from biotechnology, environmental engineering, and pharmaceuticals to specialty chemical and utility companies. His service includes providing consultation in occupational medicine/toxicology, assessing potential onsite health risks, implementation of federal drug abuse detection programs and multi-site medical surveillance programs.
In 2004, Dr. Greaney was one of 10 participants selected—out of a pool of almost 200 applicants—to present at a NIOSH symposium, Steps to a Healthier US Workforce. This event was aimed at discussing how employer best practices can integrate individual worker health and healthy lifestyle promotion with protecting and improving working conditions. At the event, Dr. Greaney presented the paper, “Bridging the Gap Between Occupational and Non-occupational Medicine Practices to Improve Employee Health.”
In November 2001, Dr. Greaney was recognized by NIOSH at a national workshop on Best Practices in Workplace Surveillance. He co-authored the case study "A Model Medical Surveillance Program For Persons in Hazardous Waste Operations" which demonstrates the impact of elevating medical monitoring programs to a best practice level. Another accomplishment is his election in 2002 as the Speaker of the House of Delegates for the American College of Occupational and Environmental Medicine, an international medical society of more than 6,000 occupational and environmental physicians.
John Paul M. Longphre, M.D., M.P.H., Associate Medical Director
Dr. Longphre is a graduate of Duke University and the University of North Carolina, Chapel Hill and specializes in occupational and environmental medicine. He recently completed a fellowship with The Duke Center for Hyperbaric Medicine and Environmental Physiology and maintains an interest in Undersea and Hyperbaric Medicine.
As the associate medical director for WorkCare’s Greensboro, North Carolina office, Dr. Longphre is involved with providing onsite clinical support for various clients in the aerospace and manufacturing industry.
Elaine Arcellana Tonel, D.O., M.S., Assistant Medical Director
Dr. Tonel is a recent graduate from the University of California, Irvine (UCI), Residency Program in Occupational and Environmental Medicine. Prior to entering the field of occupational medicine, she completed her family medicine training at Loma Linda University Medical Center. She is both board-certified in occupational and environmental medicine and family medicine. In addition to her clinical training a UCI, Dr. Tonel received a Master of Science degree in Environmental Toxicology.
Her work while at UCI involved work injury/illness management and medical surveillance and fitness for duty examinations for government and regulatory agencies, law enforcement, and private industry. She also served as the UCI physician consultant for Cal OSHA’s Division of Occupational Safety and Health Medical Unit and the City of Los Angeles Department of Water and Power.
As Assistant Medical Director at Workcare, Dr. Tonel’s work currently involves providing onsite clinical support for various clients in the mining, energy, construction, and pharmaceutical industry. In addition, she serves as an occupational medicine consultant for various corporate clients and is involved in health and productivity management.
Michael Henry Collins, D.O., M.P.H., M.S., Assistant Medical Director
Dr. Collins is a graduate of the University of California, Irvine (UCI), Residency Program in Occupational and Environmental Medicine. Prior to entering the field of occupational medicine, he completed a residency in preventive medicine at Loma Linda University Medical Center. He is board-certified in occupational and environmental medicine as well as preventive medicine. As part of his preventive medicine training at Loma Linda, Dr. Collins obtained a Master of Public Health Degree in Health Administration. After completing his residency training, Dr. Collins went on to obtain four years of clinical experience in both the private and public sectors evaluating, diagnosing and treating occupational illnesses and injuries.
As an Assistant Medical Director for WorkCare’s Anaheim, California office, Dr. Collins supports the occupational health goals of a variety of corporate clients through his work with their medical surveillance programs and their involvement in WorkCare’s Incident Intervention program. Dr. Collins also provides onsite clinical support to a major global client in the mining industry.