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Leadership team
John Wilson, King County Assessor
John is serving his third term after winning reelection in 2023. He's earned praise as one of King County's most innovative leaders.
Among John's accomplishments as Assessor:
- He led the office in introducing the Taxpayer Transparency Tool. It lets you see how ballot measures will impact your property taxes.
- He worked with community organizations to help pass property tax relief for senior citizens. Thousands of new applicants can stay in their homes as a result.
- He helped pass laws making it easier to fix errors and reimburse taxpayers for overpayments.
- He's a leader in identifying surplus public and vacant private property. Both provide innovative short and long-term housing solutions for homeless residents.
John served as Chief Deputy Assessor for four years. He gained a reputation for developing technology that enhances customer service and reduces costs. He also rebuilt the Assessor's website, which led to a tenfold increase in monthly pageviews.
As a member of King County's Information Technology staff, John led an effort to build a culture of innovation among county employees and departments.
John's earlier career included handling communications for the late former Congressman Al Swift. He also served as communications director and chief of staff to former King County Executive Ron Sims. Under Sims, John helped drive projects on freight mobility and the expansion of parks and open space.
John is also an experienced public affairs consultant. He worked with the American Civil Liberties Union to reform Washington's marijuana laws. He also worked with the state and Whatcom County to identify economic opportunities during the 2010 Winter Olympic Games in Vancouver, B.C.
A former journalist for KING 5 News, John is the recipient of the DuPont Columbia Award. His work appeared on KING, ABC, NBC, and CNN. He also used to report for The Seattle Times and Seattle Weekly.
John is the father of four adult children. He enjoys reading, cooking, jazz, hiking, and traveling.
Al Dams, Chief Deputy Assessor
Al is a respected senior leader and public servant with more than 30 years of experience for King County. He's held leadership roles in Assessments, Parks, Executive Services, and Public Works. Al is married with five children. He enjoys playing guitar and long-distance running.
Jeff Darrow, Residential Division Director
Jeff has been with the Assessor’s office for two decades. He has more than 25 years of experience as a real estate appraiser and holds a Bachelor of Arts in marketing from Western Washington University.
Jeff directs the Residential Division, which is responsible for inspecting and valuing all residential parcels in King County.
Jim Hall CAE, RES, MAS, Chief Appraiser and Appeals Division Manager
Jim was hired as the Chief Appraiser in April of 2020. He is an appraiser and valuation modeler with more than 32 years of experience in many types of real and personal property. He holds a Diploma in Urban Land Economics and a Certificate in Real Property Assessment from the University of British Columbia. He's a Certified General Appraiser in the state of Washington and is an Accredited Appraiser by the Washington State Department of Revenue. He is also a senior instructor for the International Association of Assessing Officers. Before joining King County, Jim was the manager of the Commercial, Industrial and Appeals section(s) of the Pierce County Assessor Treasurer’s Office and represented Pierce County in complex valuation disputes for 24 years.
Jim supervises the Appeals Division, providing oversight of appeals and assessment litigation.
Hoang Nguyen, Information Services Division Director
Hoang has been with the Assessor's office for 16 years. Hoang has a Bachelor of Science in computer engineering. Hoang has won awards from the National Association of Counties and the International Association of Assessing Officers.
Hoang directs the Information Services Division, which supports the web portal, smartphone apps, and the Computer-Assisted Mass Appraisal (CAMA) system.
Ruth Peterson, Commercial Division Director
Ruth has enjoyed being a part of the Assessor’s office for 30 years. Her credentials include a Bachelor of Arts degree in Business Administration and she’s also a certified general appraiser. Working with disabled adults, underrepresented communities, and serving the public are some of her many interests.
Ruth oversees the Business Commercial Division which values commercial parcels, personal property, residential condominiums, multi-family structures, and floating homes.
Kelsey Cruse, Accounting Division Director
Kelsey has been with the County since 2008 and with the Assessor’s Office since 2012. Her focus has always been on innovation and continuous improvement, and as the Accounting Division Director, she now concentrates on the people and processes that our taxpayers interact with most.
Kelsey directs the Accounting Division, which provides front-line customer service, maintains and adjusts parcel boundaries, orchestrates the levy certification process, and administers exemptions for Seniors and Disabled taxpayers, Current Use, Non-Profit organizations, and more.
Jonathan Larson, Administrative Services Division Director
Jonathan has served King County for more than 25 years in legal, budget, human resources, strategic planning and management roles. He holds a Bachelor of Arts degree in mathematics and economics from St. Olaf College, Masters degree in Economics from the University of Washington, and a Juris Doctorate from Seattle University. He is also a trained lean process improvement facilitator and has facilitated and led process improve across various county agencies.
Jonathan manages the Administrative Services Division, which oversees human resources, facilities, budgets, finance, strategic planning, and procurement.