Dr. Ronaldson serves as president of the newly formed Health First Medical Group, which combined Health First Physicians Group and Melbourne Internal Medical Associates (MIMA) physicians and began official operation in mid-February 2013. As president of Health First Medical Group, Dr. Ronaldson is responsible for the strategic development, operational oversight, and financial growth of over 300 physician providers and nearly 1,000 associates combined.
Most recently Dr. Ronaldson served as the CEO for MIMA, guiding the strategic direction for the multi-specialty independent physician practice. In addition, Dr. Ronaldson maintained his invasive and nuclear cardiology practice, which he began in 1986. Dr. Ronaldson was elected to the MIMA Board of Directors in 1998 and served as the group's CEO since 2010. Prior to his role as CEO, he served as its chief financial officer for twelve years. Under his leadership, Dr. Ronaldson helped to build the MIMA physician group to over 120 physicians, 30 physician extenders, and 700 support professionals.
Dr. Ronaldson has served on the medical staff for Health First Holmes Regional Medical Center since 1989. From 1992 to 1999, he served on the advisory board of The Heart Center for the hospital. Prior to moving to Brevard, Dr. Ronaldson was an attending cardiologist for the Bay Pines VA Medical Center at the University of South Florida in Tampa. He also served as an associate professor of clinical medicine for the University of South Florida.
Dr. Ronaldson conducted his internship in pediatrics and internal medicine at Staten Island Hospital on Staten Island, and served as chief resident at St. Vincent's Medical Center, also on Staten Island. Dr. Ronaldson then completed his fellowship in cardiology at the University of South Florida - Bay Pines VA Medical Center in Tampa. He then moved to Brevard to join the medical staff of Health First Holmes Regional Medical Center.