The Hollywood Bowl Orchestra (HBO) is a symphony orchestra which is managed by the Los Angeles Philharmonic Association and plays the vast majority of its performances at the Hollywood Bowl. John Mauceri led the orchestra from its founding in 1990 until he stepped down after the 2006 Hollywood Bowl season. During this time, his titles included Conductor, Principal Conductor, and finally, Director. He now holds the title of Founding Director. No replacement for Mauceri has yet been named; however, in March 2008, Thomas Wilkins was named Principal Guest Conductor of the orchestra for a two-year contract beginning in Summer of 2008.