Dukes is the vice president of the company's East Region, which includes Richmond, Columbia, Burke, Jefferson, Lincolnton, McDuffie and Washington counties.
"I am really looking forward to new challenges in my career," Dukes said in a statement. "This community is my home, but this is a wonderful opportunity for me and my family. I know that this community is also very important to Georgia Power, and the company will continue to provide strong leadership here."
Dukes, a native of Waynesboro, has been in regional oversight in Augusta since 2002.
Georgia Power's land department manages property around 14 reservoirs throughout Georgia, including some 60,000 acres of lakes, 1,350 miles of shoreline and dozens of parks developed for public enjoyment.
Dukes will assume his new role in Atlanta in early May.
"We are proud to welcome Walter Dukes to external affairs," said Craig Barrs, executive vice president of external affairs for Georgia Power. "Walt has been a tremendous leader for the company and the community in Georgia Power's East Region. He has contributed significantly to the success of the Plant Vogtle expansion project and we know he will be a valuable addition to the external affairs team."
Dukes is pastor of Oak Grove and First McCanaan Baptist Churches in Burke County. He is a member of Augusta Tomorrow and past chairman of the Augusta Metro Chamber of Commerce.
In March, Dukes was named 2009 Alvin W. Vogtle Volunteer of the Year by the United Way of the CSRA.