Graduated with honors from Boston University School of Law.
Was an attorney with the New York firm of LeBouef, Lamb, Leiby & MacRae.
Joined NBC in 1989...was instrumental in developing and launching CNBC that same year.
Played a key role in creating MSNBC in 1996. His responsibilities extended to Bravo, CNBC World, SCI FI, ShopNBC, Sleuth, Telemundo, Telemundo Puerto Rico, mun2, Trio, Universal HD, USA Network, NBC Weather Plus and the Olympics on cable. Zaslav also oversaw NBC Universal's interests in A&E, The History Channel, The Biography Channel, National Geographic International, the Sundance Channel and TiVo.
Took the helm at Discovery in January 2007