The Welsh language has been central to Efa's career as Chief Executive of the National Centre for Learning Welsh since 2016, and before that, she was Chief Executive of the Urdd for 11 years.
Mae’r Gymraeg wedi bod yn ganolog i yrfa Efa fel Prif Weithredwr y Ganolfan Dysgu Cymraeg Genedlaethol ers 2016, a chyn hynny, bu’n Brif Weithredwr yr Urdd am 11 mlynedd.