Marianne Gambelli, president of sales for the NBC broadcast network, said on Friday she was leaving NBCUniversal.
The move comes after the promotion of Linda Yaccarino to president of advertising sales for all of NBCUniversal, making her Gambelli's boss. Yaccarino joined NBCU last year and was put in charge of sales for NBCU's cable networks.
In a note to staff, Gambelli, who has been with NBC for 23 years, said that "after a great deal of thought, I have come to the realization that it's time for me to make a change. . . it's time for me to explore new opportunities."