The Madison Square Garden Company announced that Gregg Seibert has been named vice chairman. In his role as vice chairman, Mr. Seibert will work closely with MSG's executive team on the overall advancement of the sports, media and entertainment businesses. AMC Networks also announced that Mr. Seibert has been named vice chairman of the cable programming and entertainment company.

In addition to this, Mr. Seibert continues in his role as vice chairman of Cablevision Systems Corporation. Over the last six years, Mr. Seibert worked in a number of the company's key strategic initiatives including Cablevision's spin offs of The Madison Square Garden Company and AMC Networks Inc. Before joining Cablevision in 2009, Mr. Seibert held several senior leadership positions at Merrill Lynch including vice chairman, head of corporate finance and head of the global media practice.