Riverbed Technology application performance company hires Ernie Maddock, Lam Research, as...

Riverbed Technology application performance company hires Ernie Maddock, Lam Research, as chief financial officer, effective April 29 … Turner Broadcasting promotes Justin Williams to vice president-digital, TNT and TBS … Frontier Communications hires John Jureller, ex-General Atlantic, as executive vice president and chief financial officer … AMC Networks promotes Sarah Barnett to president, Sundance Channel, and she remains the network’s general manager.

Lobbyist registrations: Al Jazeera America, Law Offices of George Salem, effective Jan. 2 … Symantec, Efrus Federal Advisors, effective Jan. 7 … Devas Multimedia, Williams and Jensen, effective Jan. 14 … Internet Infrastructure Coalition, Howard Consulting Group, effective Feb. 1.