[2] On June 18, 2010 McMillian was one of three candidates recommended by the nominating commission for a vacancy on the Griffin Judicial Circuit.
[3] On August 11, 2010 Governor Sonny Perdue appointed McMillan to be a Judge of the Georgia State Court for Fayette County.
[2] On January 16, 2013 Governor Nathan Deal appointed McMillian to the Georgia Court of Appeals to fill the vacancy created by the resignation of A. Harris Adams.
[8] On March 27, 2020, Governor Brian Kemp announced his appointment of McMillian to the Supreme Court of Georgia.
[2] Since 2019, she serves or has served in leadership roles for the Georgia Asian Pacific American Bar Association, the Fayette County Historical Society, the Partnership Against Domestic Violence, the Real Life Center, the Atlanta Chapter of the Federalist Society for Law and Public Policy Studies, the Georgia Legal History Foundation.