Clayton Thomas-Muller, of the Mathias Colomb Cree Nation, also known as Pukatawagan in Northern Manitoba, Canada, is an activist for Indigenous rights and environmental justice. With his roots in the inner city of Winnipeg, Manitoba, Canada, Clayton began his work as a community organizer, working with Aboriginal youth. Over the years Clayton's work has taken him to five continents across our Mother Earth. Based out of Ottawa, Ontario, Canada, Clayton is involved in many initiatives to support the building of an inclusive movement for energy and climate justice. He serves on the board of the Global Justice Ecology Project and Canadian based Raven Trust.

Clayton Thomas-Müller speaks out against the environmental racism related to the tar sands projects. A final decision on the Keystone XL pipeline is expected later this year.