Riley previously served as Georgia’s first woman State Treasurer and State Revenue Commissioner. Elected in 2010 to serve in the Georgia General Assembly representing House District 50 (Johns Creek), Lynne began her career in public service as Fulton County Commissioner for District 3 (North Fulton) in 2004.

Lynne serves on the Board of the Education Finance Council and serves as CEO of the REACH Georgia Foundation. Riley is an alumnus of the Atlanta Regional Commission's Regional Leadership Institute and the Coverdell Leadership Institute. Lynne is the Chairman of the Emory Johns Creek Hospital Board of Trustees. Lynne was appointed to the Internal Revenue Service Electronic Tax Administration Advisory Committee in 2018 for a three-year term.

Lynne was Principal of Riley Accounting Services for 32 years. Lynne and her husband Mike made the Johns Creek community their home in 1988 and have three adult children and three grandchildren.