Efa appeared before Senedd's Culture, Communications, Welsh language, Sport and International Relations Committee as a preferred candidate for the post on 13 October.
Fe wnaeth Efa ymddangos gerbron Pwyllgor Diwylliant, Cyfathrebu, y Gymraeg, Chwaraeon a Chysylltiadau Rhyngwladol y Senedd fel ymgeisydd a ffafrir ar gyfer y swydd ar 13 Hydref.