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Division Directors

Florida Department of Health in Monroe County

Medical Director, Dr. Mark Whiteside, MD, MPH

Dr. Mark Whiteside, MD, MPH, has been the Medical Director of the Florida Department of Health in Monroe County since 2008.  He has worked with local health departments, including Palm Beach, Dade, and Monroe Counties since the 1980s. He is trained in infectious and tropical disease.  He has a Master’s in Public Health from the University of Miami. He has been involved in research and clinical work with HIV and AIDS since the very beginning of the epidemic. He has also done work and research with various arboviruses, including Dengue. He is a birdwatcher and is married with two teenagers.


Assistant County Health Department Director, Mary Vanden Brook, JD

Mary Vanden Brook has served as Administrative Services Director for FDOH-Monroe since 2009.  In this role, Mary provides direction and oversight for the Business Office, Facilities and Fleet, Information Technology, Human Resources, Vital Statistics, and Records Management.  Responsibilities also include legal analysis of a wide variety of issues affecting Department operations, accreditation, and strategic planning.

Mary has been an employee of the State of Florida since 1990.   She began as Staff Counsel for the 16th Judicial Circuit’s Guardian ad Litem Program.  In 1992, Mary became the Director of the GAL Program, with administrative responsibility for daily supervision of case coordinators, staff counsel, and clerical personnel, as well as recruitment, training, and supervision of 50 – 60 lay volunteer child advocates.  From 1995 to 2005, Mary served as Family Court Manager, General Magistrate, and Mediator for the 16th Judicial Circuit.  From 2005 – 2008, Mary served as Trial Court Administrator for the 16th Judicial Circuit, and was responsible for the day-to-day operations and functions of all Courts throughout Monroe County.

Mary received her Juris Doctor degree from Marquette University Law School in 1983, and a Bachelor of Arts, with Honors, from the University of Wisconsin-Madison, in 1979.  She was admitted to practice in the Wisconsin Bar in 1983, and in Florida in 1987.