Mark Seifert, ex-Commerce Department and House Commerce Committee, becomes...

Mark Seifert, ex-Commerce Department and House Commerce Committee, becomes partner at Brunswick Group consulting firm … Joseph Titlebaum, ex-XM Satellite, becomes Ion Media networks general counsel … Changes to Rainbow Media ad sales: Bill Rosolie moves to executive vice president-Rainbow National Services, new position; Executive Vice President Scott Collins adds responsibility for advertising sales for AMC … Kerry Johnson, Sinclair, adds responsibility as general manager, KGAN-TV Cedar Rapids … Weather Channel Cos. hires Nancy Mazzei, ex-Most & Co., as vice president of design.