Sony Corp appointed a president for its U.S. based entertainment business, this is a latest move in a series of management changes at the Japanese consumer electronics giant which is trying to bolster its finances. Sony appointed Nicole Seligman, the head of its U.S. operations, to the new role which reports to Sony Entertainment Cheif Executive Michael Lynton. She will step down from her current role but will still advise on legal issues. Her appointment will be voted on at the board meeting on June 19.