Norfolk Southern, a national railroad company with a major presence in Atlanta, plans to move more employees to the city as it closes an office building in Roanoke, Va.

The company on Tuesday said about 500 people currently in marketing, accounting, information technology and other departments will either move to Atlanta or Norfolk, Va.

“We are still in the process of making that determination,” spokesman Robin Chapman said. The exact number moving to the company’s Midtown offices on Peachtree Street will depend on who is willing to relocate.

Norfolk Southern has about 2,800 management and operational employees in Atlanta, which will now be one of two company headquarters after Norfolk.

“Atlanta is a very big presence for us, “ said Chapman, who called the city the company’s operational headquarters, while Norfolk is the corporate headquarters.

After the relocations, about 1,200 workers will remain in Roanoke, which will be headquarters for the company’s Virginia Division.