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Altice USA announces Marc Sirota, ex-Comcast, as chief financial officer, effective March 1 when current CFO Michael Grau leaves, becoming senior adviser to CEO Dennis Mathew until early July; Leroy Williams, ex-Samsung Electronics America, as executive vice president-chief growth officer; David Williams, also ex-Comcast, as executive vice president-chief revenue officer, succeeding Matthew Grover, moving to senior adviser through June before retiring; and promotes Shuvankar Roy to executive vice president-chief customer experience officer.

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Sinclair’s Diamond Sports Group names David DeVoe, ex-21st Century Fox, chief operating officer-chief financial officer, and Eric Ratchman, ex-Amazon, president-distribution and business development, newly created role ... JMA Wireless taps Kymeta’s Neville Meijers, also former Qualcomm, as chief commercial officer ... Kayhan Space names Matthew Shouppe, ex-LeoLabs, chief commercial officer.

Belden promotes Brian Lieser to executive vice president-industrial automation solutions, succeeding Ashish Chand, newly appointed president-CEO and added to the board to replace Roel Vestjens, departed ... Cybersecurity company InQuest adds Vincent Stewart, former deputy commander at U.S. Cyber Command, as an adviser ... ImagineAR adds Steve Ziff, ex-Thrill One Sports and Entertainment, and Bold Commerce’s John Torris, as advisers ... Guerrilla RF adds Virginia Summerell, ex-Tanger Outlet Centers, to its board.