Clark Mather

Clark was appointed Executive Director of NW RiverPartners in April 2024. As Executive Director, he reports to the Board and leads the NW RiverPartners team to educate communities and advocate for clean, reliable and affordable hydropower. Clark joined NW RiverPartners after 11 years with Tacoma Public Utilities (TPU), serving the last 7 years as the organization’s government affairs officer. Prior to his time at TPU, Clark served in senior advisory roles for U.S. Senator Maria Cantwell (WA) and Former Congressman Norm Dicks (WA-06). Throughout his congressional service, Clark focused on important regional issues including energy, defense, veterans, water, public lands, economic development and agriculture. Mather earned Bachelor of Arts degrees in both communications and political science from Washington State University, graduating Summa Cum Laude. Mather currently serves as chair of the National Hydropower Association’s legislative affairs committee and is a 2019 graduate of the American Leadership Forum.