Charlotte Nash, the chairwoman of the Gwinnett County Board of Commissioners, has announced that she will not seek re-election.

Nash was elected to chair the commissioners in 2011 and has won re-election twice, in 2012 and 2016.

Prior to serving as a commissioner, she worked for the county as County Administrator, Director of Financial Services, Budget Director, and Grants Manager.

"I have decided not to seek re-election," Nash told 11Alive in an email. "After 40 years of serving Gwinnett in one role or the other, it is time for me to focus on family and enjoying retirement with my family."

Nash was a strong proponent for pushing for MARTA expansion into Gwinnett County in the recent referendum. That referendum failed in March.

The political landscape in Gwinnett County has been changing for some time. In the November election, Gwinnett voters sent Democrats to the county commission for the first time in 30 years. Those commissioners, Ben Ku and Marlene Fosque, were the first Asian and African American commissioners, respectively, to serve on the board.

Want more Gwinnett County news? Like us on Facebook.

RELATED: Lawrenceville mayor will not seek re-election