Related: Chris Castallo To Head Alternative At CBS

Jennifer Bresnan, who has headed CBS’ alternative programming department since 2008, will be leaving the network. She is relocating to New York, where her husband, CBS Corp COO and Leslie Moonves’ right-hand man Joe Ianniello, and family live. For the past few years, Bresnan had been shuttling back-and-forth between New York and LA where he job is based. This is the second reality chief of a broadcast network to depart in the past couple of months, following Mike Darnell’s exit from Fox. But while the search for Darnell’s replacement is still ongoing, I hear CBS is expected to fill the vacancy immediately, with SVP Chris Castallo, Bresnan’s strong No. 2, rumored to succeed her. Bresnan will step down from her day-to-day role in the department at the end of the summer but will continue to work at CBS consulting on unscripted series. “Jen has been an outstanding leader of this department, with tremendous passion for the genre and creative energy for our shows,” said Nina Tassler, President of CBS Entertainment. “She launched the most successful new network reality show in years with Undercover Boss, and has worked closely with our producers to keep Survivor, The Amazing Race and Big Brother at the top of their game — three popular, long-running franchises that continue to play an important role in the network’s ratings leadership.” Undercover Boss, which launched as the most watched post-Super Bowl series debut in 2010, is a rare recent broadcast unscripted hit as the networks have struggled to produce new tentpole shows beyond NBC’s The Voice and Fox’s Gordon Ramsay franchise. “I am so grateful to Leslie Moonves and Nina Tassler for bringing me into the CBS family and for their remarkable support,” Bresnan said. “It has been an incredible honor to work with the strongest reality brands in the business, and I have the deepest respect for my team and all the producers whose passion keeps these shows thriving. It’s easier stepping down when it’s not goodbye, just a different location, and I am very excited to begin a new chapter of my life on the East Coast.”