Caroline Skinner
From Tardis Wiki, the free Doctor Who reference
Caroline Skinner is the new executive producer who has been working with Steven Moffat starting with The Doctor, The Widow and The Wardrobe. She is replacing Piers Wenger and Beth Willis.
Sources
http://www.bbc.co.uk/doctorwho/dw/news/bulletin_110718_01/Steven_Moffat_on_the_New_Exec http://www.bbcamerica.com/anglophenia/2011/07/new-doctor-who-executive-producer-revealed/