Karen Sheriff has been tapped as COO of Bell Aliant. Formerly president of Bell Canada's small and medium-sized business division, she brings a wealth of experience to the position.The company also made changes to its board of directors. Lawson Hunter has left his position as trustee and chair of the Bell Aliant Income Fund as well as his seat on the board of directors for Bell Aliant's main operating subsidiaries. Michael Sabia and Patrick Pichette have also resigned from their positions with the board.George Cope, newly minted president and CEO of BCE Inc., Siim Vanaselja, CFO of BCE and David Wells, a seasoned telecommunications executive with more than 30 years of industry expertise, have been appointed members of the Bell Aliant operating company boards. Cope was elected chair of the board.