Altice USA is making changes at the top: The cable operator announced that it has recruited Comcast veteran Dennis Mathew as CEO.

Mathew takes over effective Oct. 3, assuming the CEO role from Dexter Goei, who has been named executive chairman of the board of directors. All of Goei’s direct reports will report to Mathew. Patrick Drahi, Altice USA’s founder and current chairman, will remain a director on the board.

The No. 4 U.S. cable operator said it made the move to hire a new CEO “given Mr. Goei’s intention to return to Europe with his family.” Goei has worked for France’s Altice since 2009, leading the telecom company’s entry into the U.S. market through the acquisitions of Cablevision Systems and Suddenlink Communications, which now comprise Altice USA.

Mathew, 45, joins Altice USA from Comcast, where he spent the last 17 years in senior corporate and operational leadership positions.