Margaret Brennan
President/Chief Executive Officer


Ms. Margaret Brennan has over 30 years of progressive management and leadership experience in public and private health care sectors.  Her diverse background includes outpatient and inpatient settings offering primary, specialty, and tertiary care services.  Ms. Brennan’s visionary leadership style builds upon CHC’s long history, strengths, and commitment to excellence.  She strives to improve the health and well-being of the communities we serve; while providing exceptional and compassionate care in the most effective manner possible. Ms. Brennan has received recognition for her contributions in health care at local, state and federal levels.  She is a volunteer board member on several non-profit and maintains a leadership role with Orange County Primary Care Access Network (PCAN); a nationally recognized integrated delivery model serving over 100,000 patients annually.  Additionally, Ms. Brennan holds a Master of Science in Strategic Leadership from Mountain State University and has served as College Area Chair/Lead Faculty at the University of Phoenix.  She has taught in the areas of healthcare administration, community health, public policy, management and leadership.

Mark Dickinson
Vice President/Chief Financial Officer


With more than 30 years’ experience in healthcare finance, Mr. Dickinson spent the first 15 years of his career in the hospital industry before settling into the world of Community Health Centers. He has built a strong background in financial and operational aspects of FQHC’s. Starting in Detroit, MI, he was instrumental in growing an organization to 6 sites and achieving JCAHO accreditation.  He spent several years as the CFO for a statewide shared services network in Indiana and returned to health center finance in Akron, OH.  A graduate of Walsh College in Troy, MI, Mr. Dickinson is proud of his work to strategically position CHC as a preferred premier medical and dental home, as well as, the continued growth of services offered to our underserved communities.

Kim Barkman
VP/Chief Information Officer/Corporate Security Officer


Kim Barkman has been in the Healthcare industry for over 35 years. She started her career as a Registered Nurse with a BSN from the University of Florida.  After many years in clinical practice in acute care settings, Kim became committed to identifying ways of leveraging technology to produce quality outcomes in healthcare. She is Board Certified in Nursing Informatics and Project Management.  In 2014 Kim was the lead on CHC being recognized as a HIMSS (Healthcare Information and Management Systems Society) Davies Award winner for Community Health.  Kim has been a speaker on various Information Services topics at HIMSS, CFHIMSS and FHIMA National conferences. She is an active member of HIMSS and AEHIS (Association for Executives in Healthcare Information Security).

Cheryl Viadero
Vice President of Human Resources/Chief Compliance Officer


With more than 20 years of experience in Human Resources, Ms. Viadero spent the majority of her career in the hospital industry.  She has experience in many areas of Human Resources including Employee Relations, Communication, Recruitment, Rewards & Recognition, and Training.  Ms. Viadero completed a Master’s Degree in Human Resources Management and Leadership Development from Webster University in 2010.  She holds certifications in HRCI Senior Professional in Human Resources and SHRM Senior Certified Professional.  Ms. Viadero is responsible for all human resources functions, credentialing, risk management and safety at CHC. 

Debra Andree
Vice President/Chief Medical Officer


Dr. Andree obtained her Doctor of Medicine degree from the University of Miami and prior obtained a Bachelor of Science degree in Nursing from the University of Florida.  Dr. Andree joined CHC as a Pediatrician in 2002, was promoted to Chief of Pediatrics in 2013.  Dr. Andree believes strongly in life-long learning and the importance of educating future medical professionals.  She maintains a prestigious faculty position with Florida State University. Dr. Andree is active with the Florida Association of Community Health Centers and strives to ensure that CHC provides optimal, safe patient care leading to the improved health and well-being of our patients.

Gregg Stewart
Vice President/Chief Dental Officer


In 1984, Dr. Stewart completed the dentistry program at the University of Florida College of Dentistry and has held a Dental License in Florida since that time.  He is a member of the Dental Society of Greater Orlando, Central District Dental Association, Florida Dental Association, American Dental Association and a fellow in the American College of Dentists.  Being a musician as well as a dentist, Dr. Stewart turns running a dentistry practice for uninsured and underinsured patients into an art.  While working full-time as a dentist, he has also found the time to seek out volunteers in the dental community as well as in-kind donations.  Because of these efforts, we are able to continue to provide high quality dental care.

Kathy Jo Bailey
Vice President/Chief Operations Officer


Ms. Kathy Jo Bailey has nearly 30 years of experience in the healthcare field with 20 of those years in the Central Florida region. Her career has included leadership roles in physician-owned private practice, management services organizations, large for-profit and not-for-profit hospitals, small community hospitals and residency programs.