At Leo Burnett, Cheryl Berman -- chairman and chief creative officer of Leo Burnett USA -- has been been named chairman of Leo Burnett North America. Berman will continue her role as CCO for the U.S. Meanwhile, Leo Burnett USA vice chairman and deputy chief creative officer Mark Tutssel has been been named regional creative director for Leo Burnett North America. Additionally, Berman has announced a reorganization of the agency's Chicago creative department into six "creative communities" led by group creative heads John Condon, Bob Dreveny, Jonathan Hoffman, John Montgomery, Tim Pontarelli and the team of Josh Denberg and Paul Hirsch, who will together head one group. ... Music video and blockbuster features director Brett Ratner (Rush Hour, Rush Hour 2) has signed with HSI Productions for commercials and music video representation. Ratner was formerly represented by Villains.