Nancy Han, a veteran ABC News executive who has supervised that outlet’s live-streaming and early-morning efforts, will join “CBS This Morning” as senior producer of the program’s 8 a.m. hour.

“She’s a proven leader with experience in all areas of our business,” said Ryan Kadro, the executive producer of the CBS morning program, in a memo to staffers Thursday.

Han joins the program as it hopes to make new headway against A.M. rivals “Today” on NBC and “Good Morning America” on ABC. “CBS This Morning” avoids some of the fluffier morning-show conventions, like cooking presentations and an on-air meteorologist, in favor of a harder news bent. Over the course of four years, it has notched a 45% increase in viewership, making it the most competitive effort CBS has launched in the morning in decades.

Han was most recently an executive producer at ABC News, overseeing the network’s 24/7 live streaming digital channel, ABC News Now,”, which she helped launch more than seven years ago.  She was also the executive producer of ABC News’ Early Morning News, overseeing World News Now,” “America This Morning,” and the news inserts for “Good Morning America.” She also played an integral role in the ABC News/Yahoo News partnership and launched a full slate of co-branded, original shows in 2011, with talent including Katie Couric and Christiane Amanpour. She teaches broadcast news courses as an adjunct professor at her alma mater NYU.