Thomas was elected to the Regional Council in 2019 as the top polling candidate for Pōneke Wellington and he chaired the Council’s inaugural Climate Committee. He now Chairs the regional Transport Committee. Thomas is also a founding co-director of independent think tank Te Kuaka New Zealand Alternative and social entrepreneur in residence at Massey University. He's done over 20 years of social change work, influencing law and policy at the local, national and international level. Before returning to Aotearoa New Zealand in 2017, he led the international campaign to ban cluster bombs, was the founding director of London-based humanitarian organisation Article 36 and played a leading role in the 2017 Nobel Peace Prize-winning International Campaign to Abolish Nuclear Weapons. He's committed to economic, social and environmental justice, with specific interests in natural infrastructure, the climate transition, new models of economics and ownership and the future of housing, transport and urban design.