Mari Elin Wiliam’s academic studies were completed at the School of History, Welsh History and Archaeology, Bangor University (BA 2002; MA 2004; PhD 2009). After a period teaching for the Open University and working at the Welsh Language Planning Centre, she was appointed a Research Assistant on the Duncan Tanner Archive project at Bangor in 2010–11.
Following a further year as both a part-time tutor and researcher on a Coleg Cymraeg Cenedlaethol website at Bangor, she was appointed a full-time lecturer in September 2012. Her PhD was supervised by the late Professor Duncan Tanner, and it focused on cultural and social change in Wales during the period 1950–62.
She is in the process of developing it into a Welsh language monograph entitled ‘Moderneiddio, hunaniaeth a Phrydeindod yng Nghymru, 1939-c. 1962’ (Modernisation, identity and Britishness in Wales, 1939-c. 1962). She is currently also participating in research projects and collaborations focusing on the history of the Urdd youth movement, the Llangollen International Eisteddfod, the Labour Party and oral history. She teaches and researches through the medium of English and Welsh.