Norman, Calderone take on new responsibilities.

MTV Networks is establishing new leadership on the channel level at MTV and VH1. VH1 president Christina Norman has been named president of MTV, while MTV executive VP of programming and talent Tom Calderone has been named GM of VH1.

The moves come in the wake of Van Toffler’s ascension from MTV/MTV2/MTV Films president to MTV Networks Group president in October. Norman and Calderone are based in New York and report to Toffler.

Norman is credited with re-energizing VH1’s on-air design and overall creative direction amid a strong ratings run for the channel, which has posted 11 consecutive quarters of ratings growth. Calderone has overseen the development of such music franchises as “Spankin’ New Music” and “MTV Ultimate Mash-Ups” and has played a role in recent changes at MTV2.

In her new role, Norman will be responsible for the day-to-day leadership, strategy and management of MTV. Toffler says a key focus of Norman's job will be transforming MTV from a “TV program-centric” model to one that looks to take advantage of programming opportunities online, on cell phones and elsewhere.

Calderone will be responsible for the day-to-day leadership, strategy and management of VH1. “Tom can help beef up their music events and their long-form music series like 'Storytellers' and ' Live',” Toffler says. Calderone will also partner with Brian Graden, president of entertainment for MTV Networks Music Group, to build on the network’s momentum.

Says Graden in a statement: “With a full roster of 'celebreality' programming, a reinvigorated 'Storytellers' franchise and more than 10 new series debuting throughout the rest of the year, VH1 is well positioned for continued growth and success.”