Diane Taniguchi-Dennis, P.E., BCEE, MBA, Chief Executive Officer 

Diane was appointed by the Board of Directors in 2018 as the fifth leader in Clean Water Services' 50-plus-year history. She is a nationally recognized water leader serving on the boards of the National Association of Clean Water Agencies and Willamette Partnership. She is part of the Research Advisory Council for the Water Research Foundation and the Advisory Board of World Water Tech North America.

Diane is Clean Water Services' first Chief Executive Officer. The title recognizes the diverse range of activities and interests CWS engages in as a leader in watershed management, a Utility of the Future and a Leading Utility of the World.

Winner of the 2019 Water Finance & Management Award, Diane is a licensed Professional Engineer in the State of Oregon and a Board Certified Environmental Engineer. She holds a Bachelor of Science in Civil and Environmental Engineering from Cornell University and a Master's of Business Administration from the Atkinson Graduate School of Management at Willamette University. Prior to joining Clean Water Services in 2011, Taniguchi-Dennis served as the City of Albany Public Works Director.

Clean Water Services Board of Directors

Although Clean Water Services maintains a close working relationship with Washington County government, we are a county service district organized under Oregon Revised Statute 451 that serves as a separately managed and financed public utility. Our Board of Directors is comprised of the individuals who are elected as Washington County Commissioners:

  • Kathryn Harrington, Chair - at large
  • Nafisa Fai - District 1
  • Pam Treece - District 2
  • Roy Rogers - District 3
  • Jerry Willey - District 4

View past and present agenda items on the Washington County iAgenda site.

Clean Water Services Advisory Commission

The purpose of the Clean Water Services Advisory Commission (CWAC) is to review and discuss major policy issues and programs related to the management of water resources in the Tualatin River Watershed and make recommendations to Clean Water Services' Board of Directors. 

Learn more about CWAC members, meetings and minutes.


Business Partners

The Business Partners team for Clean Water Services is comprised of:

  • Diane Taniguchi-Dennis, Chief Executive Officer
  • Bob Baumgartner, Regulatory Affairs Director
  • Nate Cullen, Chief Operating Officer
  • Joe Gall, Chief Utility Relations Officer
  • Holly Dober, Human Resources & Risk Management Director
  • Mark Jockers, Chief of Staff
  • Kathy Leader, Chief Financial Officer
  • Jerry Linder, General Counsel
  • Ting Lu, Digital Solutions Business Practice Leader
  • Stephanie Morrison, Office Manager for the Office of the CEO
  • Bruce Roll, Natural Systems Enhancement and Stewardship Director
  • Ken Williamson, Research and Innovation Director
Clean Water Institute

The Clean Water Institute is a 501(c)3 nonprofit organization, created to expand Clean Water Services' ability to promote scientific research, education and environmental protection activities that benefit watersheds around the world.

Scroll through our 2021 Annual Report to explore our Year in Review.

Year in Review

Receive news on what we are doing in the community and our innovative solutions to continue on providing clean water.