STUDIO CITY, Calif., Feb. 20, 2014 /PRNewswire/ -- CBS Corporation (NYSE: CBS.A and CBS) announced that Nina Tassler has been promoted to Chairman of CBS Entertainment, and has signed a new agreement with the Company that extends through 2017. The announcement was made today by CBS Corporation President and CEO Leslie Moonves, to whom Tassler continues to report. In this expanded role, Tassler will lead the Network's Entertainment programming across primetime, daytime and late night, as well as program development in all genres, including comedy, drama, reality, specials and long-form. She will direct a growing year-round programming portfolio that now includes a full slate of original series in the summer and a newly created limited series and live event program unit. Tassler will also oversee Entertainment division matters in advertising and promotion, business affairs, consumer products, digital/interactive, diversity, publicity, scheduling and research. "Nina's creative instincts, programming savvy and leadership skills have helped form a hit-making machine that has fueled the Network's success and benefitted the Company's bottom line," said Moonves. "She's been a friend and colleague for 25 years, and I've witnessed first-hand the genuine and positive energy, as well as hands-on skills, she brings to every facet of the creative process. There are very few executives with her track record of consistently achieving high-level success in all forms of entertainment programming." Under Tassler's leadership, CBS has been America's most watched network for 10 of the last 11 years. As President of Entertainment, she has introduced a steady supply of hit programs across all genres, including THE BIG BANG THEORY, HOW I MET YOUR MOTHER, THE GOOD WIFE, PERSON OF INTEREST, BLUE BLOODS, ELEMENTARY and the Emmy Award-winning UNDERCOVER BOSS. Previously, as Senior Vice President of Drama Development for CBS, she developed the highly rated and commercially successful CSI and NCIS franchises.