New “Today” show EP Don Nash has made some staff changes. 15-year NBC veteran Matt Carluccio takes over leading the 7am hour. He’s been senior producer of staffing and assignments. That job will now go to Libby Leist, an 11-year NBC veteran who has been the show’s point person in Washington, DC. Leist moves to New York for the job. And back in Washington, Scott Foster, who began his NBC career as a DC desk assistant in 2001,  will become the senior “Today” show producer in Washington.