Kara Medoff Barnett, who has held the post for the last five and a half years, will leave later this year.Kara Medoff Barnett, who has held the post for the last five and a half years, will leave later this year.Read MoreDancing, American Ballet Theater, First Republic Bank, Lincoln Center for the Performing Arts, Barnett, Kara Medoff, McKenzie, Kevin (1954- ), Appointments and Executive Changes