MSG’s New Vice Chair
The Madison Square Garden Company has a new vice chairman in Gregg Seibert.

As part of his duties, Siebert will work closely with MSG’s executive team on the advancement of the company’s sports, media and entertainment businesses.
Meanwhile, Siebert will continue his role as role as vice chairman of Cablevision Systems Corporation and will also serve as vice chairman of AMC Networks.
Both MSG and AMC were spun off from Cablevision in 2010.
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