Haf is the Director of Friends of the Earth Cymru. She was previously the organisation's Campaigner in Wales, and has been with Friends of the Earth since 2008.
In recent years she’s led a team who have successfully campaigned for a fossil free Wales with no new opencast coal mining or fracking, and support a growing network of grassroots groups across Wales. She worked in coalition to stop the M4 relief road, influenced climate legislation and the ground-breaking Wellbeing of Future Generations Act, and campaigns on a number of climate justice issues including air pollution and fuel poverty.
Haf is also Vice Chair of Healthy Air Cymru, sits on both the Climate Cymru and Fuel Poverty Coalition steering groups and was previously Chair of Stop Climate Chaos Cymru.
She previously worked in the European Parliament and studied at the University of Wales Aberystwyth and Edinburgh University.