FCC Chief of Staff Zac Katz named senior fellow...

FCC Chief of Staff Zac Katz named senior fellow at USC Annenberg’s Center on Communication Leadership & Policy … Renee Gregory, aide to FCC Chairman Julius Genachowski, to stay at commission as chief of staff, Office of Engineering and Technology … Acting U.S. Trade Representative Demetrios Marantis leaves to head international government, regulatory and policy at mobile payment company Square … Robert Pick, Comcast, joins ValueVision board … SeaChange International Chief Financial Officer Michael Bornak resigns effective May 31; Anthony Dias promoted to senior vice president and will be interim chief financial officer during the search for a permanent CFO … Amy Hood promoted to Microsoft chief financial officer, replacing Peter Klein … Christin McMeley, ex-Charter Communications, joins Davis Wright as a partner in the firm’s Washington, D.C., office …Lobbyist registrations: RIAA, Capitol Counsel, effective April 1.