Proceeds from the musical event, streamed from Florence, Italy, will go 13 theatres and institutions Felder has called home.
Executive director Karen Wood will leave the Playhouse at the completion of the 2015 season.
The 2015-16 season includes a world-premiere, an Orange-County premiere, a stage adaptation and classic musicals.
Those who stepped down from an old position or stepped up to a new one in May and June.
As they cope with a troubled economy, theatres position themselves for the future