Sioned Williams MS

Deputy First Minister and Cabinet Minister for Social Justice and Equality

Sioned Williams grew up in Cwmbrân  and was educated at Ysgol Gymraeg Cwmbrân and Ysgol Gyfun Cwm Rhymni. She’s married with two children and lives in Alltwen, in the Swansea Valley. Sioned is fluent in Welsh. After graduating in Welsh and English Literature from Aberystwyth University, she was awarded the S4C T.Glynne Davies Scholarship to study for a postgraduate diploma in Journalism at Cardiff University.

Sioned Williams was a senior journalist with BBC Wales before going to work for Swansea University as Welsh Language Policy Officer and then as Communications and Development Manager at Academi Hywel Teifi. As part of her work at the University, she helped establish and co-managed Tŷ’r Gwrhyd, the Swansea Valley’s Welsh language centre. She has also worked for Plaid Cymru as Head of Strategic Communications. Sioned has also worked as a reviewer and commentator on broadcasting and the arts for Welsh broadcast and print media and has adjudicated the Daniel Owen Memorial Prize at the National Eisteddfod and the Crown competition at the Urdd National Eisteddfod. She is a former Board member and Chair of the Bursaries Panel at Literature Wales.

Sioned Williams was Community Councillor for Alltwen and Chair of Cilybebyll Community Council  before being elected as Member of the Senedd for South Wales West in the 2021 Election. During the Sixth Senedd, she was Plaid Cymru’s Social Justice and Equalities spokesperson and a member of the Equality and Social Justice Committee and the Children, Young People and Education Committee.  Sioned was also Chair of Cross Party Groups on Human Rights, Learning Disabilities and Violence against Women and Children.

On 13 May 2026 Sioned Williams was appointed Deputy First Minister and Cabinet Minister for Social Justice and Equality.