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Cablevision vice chairman Gregg Seibert has been tapped for the same role at AMC Networks and MSG, two of Cablevision’s spinoff companies.

Seibert will work with AMC Networks prexy-CEO Josh Sapan and others to provide strategic and financial guidance on business initiatives and transactions.

The appointment of the Merrill Lynch alum suggests that AMC Networks will continue be active in dealmaking and acquisitions. The company housing AMC, SundanceTV, IFC and We TV and IFC Films was spunoff from Cablevision in 2012. In the past two years AMC Networks has acquired the international channels group ChelloMedia, and more recently it cut a deal with the BBC to buy half of the BBC America cabler.

“Gregg has more than 25 years of experience executing complex strategic and financial transactions and we look forward to benefiting from his insights on strategic matters as we continue to focus on building shareholder value,” Sapan said.

Seibert will fulfill a similar function at MSG, and he’ll continue as vice chairman of Cablevision. He joined the parent company in 2009 from Merrill Lynch, where he served as head of its global media practice and head of corporate finance.

Seibert said he was looking forward to “the opportunity to collaborate with Josh and his talented management team which has shown an ability to do innovative deals. I’m confident that together we can further advance AMC Networks’ strategy and drive long-term growth.”