Meet the MNA Board of Directors


Tonya Moore, PhD, RN
Dr. Tonya Moore has 24 years of professional nursing experience, most of which has been in various roles at the University of Mississippi Medical Center (UMMC). As executive director of leadership and workforce development at UMMC… Read More


Carl Mangum, PhD, PMHNP-BC, NHDP-BC
Dr. Carl Mangum is an Associate Professor, Director (Interim) of the Psychiatric Mental Health Nurse Practitioner Track, and Emergency Preparedness and Response Specialist at the University of Mississippi Medical Center School of Nursing. Dr. Mangum has taught nursing for 17 years… Read More


Johnnie Sue Wijewardane, PhD, APRN, FNP-BC, FAANP
As a nurse for 23 years and an APRN for 17 years, nursing is Dr. Johnnie Sue Wijewardane’s passion! Her experience spans rural health care, tertiary care, occupational health, college health, long term care, expert legal consultation, nursing education and leadership… Read More


Debra Rhinewalt, BSN, CHPN
Debra Rhinewalt is a graduate of the Mississippi University for Women where she also serves on the Nursing School Advisory Council. Her career led her to Palliative Care nursing, and she is currently the Palliative Care Clinical Coordinator at Baptist Memorial Hospital Golden Triangle… Read More

Director, Council on Advanced Practice Nursing

Shonda Phelon, DNP, RN, FNP-BC, PMHNP-BC, GNP-BC
Dr. Shonda Phelon has served passionately in the field of nursing for the past 29 years. Her nursing experience includes veteran’s affairs… Read More

Director, Council on Health Affairs

Alena Lester, DNP, APRN, FNP-C, ONP-C
Dr. Alena Lester has served as a registered nurse for 20 years. Her experience in the field is vast including such areas as intensive care, emergency room…Read More

Director Council on Organizational Affairs

Sandra “Sandi” Arnold, MSN, RN
Sandra “Sandi” Arnold serves as the Director of Clinical Education at Hattiesburg Clinic. During her nursing career of 35 years, she…Read More








Director, Council on Nursing Practice


Director, Council on Nursing Education

Tomekia Luckett, PhD, RN
Dr. Tomekia Luckett is an experienced nurse, and nurse educator. She has served as an educator in a variety of nursing education programs for licensed practical nursing through doctoral… Read More

Director, Council on Nursing Research

Ashley Krebs, PhD, RN, CHSE
Dr. Ashley Krebs is an assistant professor of Nursing at the University of Southern Mississippi. She received her Bachelor of Science (BSN) degree from the University of Southern Mississippi…Read More