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Cablevision EVP Trierweiler Left In January

John Trierweiler, Cablevision Systems' executive vice president of product management, left the cable operator earlier this year amid a spate of other high-level executive departures.

Trierweiler, who joined Cablevision in 2006, oversaw all of Cablevision's TV, high-speed Internet and voice products delivered to residential and small and medium-sized business customers.

A Cablevision spokesman confirmed that Trierweiler left the MSO in January 2012 but otherwise declined to comment. Trierweiler's public profile on LinkedIn indicates he is working as an independent marketing and product management consultant.

Several other senior managers have left Cablevision in recent months. President of operations John Bickham left the company in November, followed by chief operating officer Tom Rutledge, who a short time later was named CEO of Charter Communications.

Since then, four other top execs have hit the exits: EVP of marketing John Hargis -- who this month joined Rutledge as Charter's head of marketing -- EVP of corporate technology and engineering Jim Blackley, EVP of consumer operations Kathleen "Kip" Mayo and David Kline, president and chief operating officer of media sales.

In November, Cablevision promoted Kristin Dolan to senior executive vice president of product management and marketing. Kristin Dolan, wife of CEO James Dolan, has spent more than two decades with the company and had been running Cablevision's strategic product development group over the past three years.

Separately, last month the MSO hired Yvette Kanouff, formerly president of SeaChange International, as executive vice president of engineering, software design. She reports to Wilt Hildenbrand, senior advisor of engineering and technology. Cablevision also hired Greg McCastle, senior vice president at AT&T Services and head of AT&T AdWorks, to replace Kline.

Under Trierweiler's leadership, Cablevision launched the first full cable TV service delivered to customers on an iPad in the home, the first 101-Mbps broadband service based on DOCSIS 3.0 and the first remote-storage DVR (dubbed DVR Plus).

In addition, Trierweiler led the teams that deployed Cablevision's Optimum Link PC-to-TV service, as well as personalized TV mosaics -- enabled via the ActiveVideo Networks interactive TV platform -- and Caller ID on the TV.

Before joining Cablevision, Trierweiler was vice president of marketing strategy at Time Warner Cable, which he joined in 1998 as vice president of marketing and sales for the company's Los Angeles division.

Trierweiler began his career with the N.W. Ayer Advertising Agency in 1985. He joined the H.J. Heinz Company in 1987, and held product management positions in the StarKist and Pet Products groups. In 1990 he joined Bumble Bee Seafoods, where he became the head of marketing in 1992.