Complex sentence: Paul Miller, currently an associate director at the Crucible Theatre in Sheffield, has been appointed as artistic director to succeed Walters, the UK's longest-serving theatre director, when he leaves the Orange Tree Theatre in June 2014.
Split into simpler sentences: Paul Miller, previously associate director at the Crucible Theatre in Sheffield, is the artistic director. He succeeded Walters, the UK's longest-serving theatre director, who left the Orange Tree Theatre in June 2014.