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' 48-year-history. She is a nationally recognized water leader serving on the boards of the National Association of Clean Water Agencies, WateReuse and The Water Research Foundation

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

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 for 12 years.

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.

Clean Water Services Board of Directors

Although Clean Water Services maintains a close working relationship with Washington County government, we are a special service district 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:

  • Andy Duyck Chairman - at large
  • Dick Schouten - District 1
  • Greg Malinowski - District 2
  • Roy Rogers - District 3
  • Bob Terry - District 4
Leadership Team

The Leadership Team for Clean Water Services is comprised of:

  • Diane Taniguchi-Dennis, Chief Executive Officer
  • Bob Baumgartner, Assistant Regulatory Affairs Department Director
  • Nate Cullen, Wastewater Treatment Department Director
  • Nora Curtis, Conveyance Systems Department Director
  • Holly Dober, Employee and Labor Relations Manager
  • Mark Jockers, Government & Public Affairs Manager
  • Kathy Leader, Finance Manager
  • Jerry Linder, General Counsel
  • Victoria Nolan, Risk & Benefits Manager
  • Mark Poling, Business Services Department Director
  • Bruce Roll, Watershed Management Department Director
  • Mat Stickler, Information Technology Division Manager
  • Ken Williamson, Regulatory Affairs Department Director
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.


Flip through our Annual Report to learn more about what we've done in the last year.

Annual Report

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