In an attempt to strengthen its executive ranks, Sony Pictures Entertainment (SPE) has retooled, leaving a worldwide marketing executive seemingly without a job. Chief of worldwide distribution, Jeff Blake has assumed the duties of Bob Levin, who had held the post of marketing exec. Levin, who was in New York yesterday for the CHARLIE'S ANGELS premiere, was not available for comment and no word was announced on his definite future with the company or otherwise. According to insiders, there were tensions between Blake and Levin, who has 1 1/2 years left on his contract. As part of the restructure, Columbia TriStar Motion Picture Group president Kenneth Lemberger has been promoted to co-president of Sony Pictures Entertainment, opposite president and CEO Mel Harris. Therefore, president of Columbia TriStar Home Video Group Ben Feingold will take over many of Lemberger's old duties in the business and operations of the Motion Picture Group. SPE chairman John Calley said the new structure is designed "to broaden and strengthen the management base for overall company operations."