Longtime Fox Searchlight publicity executive Cassandra Butcher has been hired by BRON Studios to become its chief marketing officer. She now joins the producer-financier behind upcoming pics like The Front Runner and The Nightingale, and which has films like Jay Roach’s Roger Ailes movie, the Tom Hanks-starrer Greyhound, the Al Capone movie Fonzo and Bill Condon’s The Good Liar in the works. In her new role Butcher will oversee all marketing campaigns and work with the…