Silver Spring-based Discovery Communications has named Liz Claiborne and former General Electric/NBC Universal exec Andrew Warren to the post of senior vp and chief financial officer.

He’s replacing Brad Singer, who we’ve known since July would be resigning at the end of March, because Discovery said so. Singer had joined the cable giant in 2008 as CFO.

 “Having worked extensively with Andy at NBC Universal, I know firsthand what an effective and strategic leader he is, how knowledgeable and passionate he is about the media business, and what a great addition he will be to our already strong senior management,” Discovery Communications president and CEO David Zaslav said in Monday’s announcement.

Since 2007, Warren has been Chief Financial Officer at Liz Claiborne, Inc. Before that, he spent 18 years at then-NBC-owner General Electric, where he held a number of posts, including CFO of the NBC Universal Television Group. That made him responsible for all finance activities at the NBC, NBC Studios, CNBC, MSNBC, USA, SciFi and Bravo.

Monday’s announcement also included a restructuring of Discovery’s top ranks in the wake of its decision to eliminate the position of COO. The COO was former Fox exec Peter Ligouri. Ligouri bowed out at the end of December, after just two years on the job, leaving Discovery’s co-ventures OWN and Hub – in which it is partnered with Oprah Winfrey’s Harpo, and Hasbro, respectively – struggling to find an audience.