Before becoming the first lady of Georgia, Dunagan taught language arts at public schools for over 15 years, and retired as a sixth-grade middle-school teacher in
Hall County, Georgia. During her tenure as Georgia's first lady, she advocated for literacy and education throughout the state, for which the Georgia Association of Broadcasters awarded her their 2016 "Georgian of the Year" award. In 2015, her book
Memories of the Mansion: The Story of Georgia’s Governor’s Mansion was published. Copies of the book were donated to every public library in the state of Georgia. In 2016, she served as the keynote speaker at
Georgia Gwinnett College's summer commencement. In 2017,
Georgia College & State University unveiled the Sandra Dunagan Deal Center for Early Language and Literacy. A state-funded educational institute, the center aims to provide professional development, or training, to early elementary teachers to improve the early language and literacy skills of Georgia's children by providing research-based professional development for organizations working with children from birth through age 8. ==Personal life==