Garner is an associate professor of family medicine at the University of Alabama and the executive director of the student health center, where she also serves as the director of the Department of Health Promotion and Wellness.
Garner helped establish and was the first chair of the Alabama Food and Nutrition Exposition, a unique partnership of the Alabama Dietetic Association, Alabama Dietary Managers Association and Alabama School Nutrition Association. In 2011, she received the Academy's highest honor, the Marjorie Hulsizer Copher Award. Garner has served in many leadership roles in the Academy, including as a member of the Board of Directors and Commission on Dietetic Registration. She was a member and chair of the Academy's Legislative and Public Policy Committee, Political Action Committee, Coding and Coverage Committee, Council on Education and Strategic Planning Task Force. Garner is a past president of the Tuscaloosa District Dietetic Association and the Alabama Dietetic Association.
A graduate of Georgia Southern College, Garner earned a master's degree from the University of Tennessee, where she also did postgraduate work in nutrition and mental retardation.