WFAA-TV has appointed Valerie Roberts executive producer. At the Dallas-based media outlet, Roberts will oversee the station's dayside news producers, writers and support personnel, as well as shape the editorial content. She previously was managing editor at the ABC affiliate WXYZ-TV in Detroit. In addition, the station has promoted Nicki Harkrider to local sales manager. In her new role, Harkrider will lead a sales team of five account executives. She joined WFAA in 2002 as an account executive.