King County RFPs

On-call Learning Consultant (Request for Proposals)

Provide an On-Call Learning Consultant on an as-needed basis.

Aluminum Trail Bridges RFP

King County issued solicitation KC001743, titled “Aluminum Trail Bridges,” as an active goods-and-services solicitation.

2026-2027 Small Works Roster

2026-2027 small works roster.

2026 Vendor Roster

2026 vendor roster.

Engineering, Planning, and Design Services for RapidRide R Line

King County is soliciting engineering, planning, and design services for the RapidRide R Line under solicitation KC001764.

Aluminum Trail Bridges

King County issued solicitation KC001743, titled “Aluminum Trail Bridges,” as an active goods-and-services solicitation.

Whiteboards, Tackboards, Digital Interactive Boards & Display Cases RFP

Whiteboards, tackboards, digital interactive boards & display cases.

RFQ-Administrative Printing Services

King County Executive Services is seeking qualified firms to establish a roster for administrative printing services under the scope of work and technical requirements.

RFP-Low-Med Voltage Transformer Inspection, Analysis and Diagnostics

King County Wastewater Treatment Department (WTD) is soliciting proposals from interested and qualified suppliers to provide field services and assessment of Liebert Equipment power transformers in accordance with the Scope of Work/Requirements

ITB Sand, Rock & Gravel

King County is soliciting bids from interested and qualified firms to provide sand, rock, and gravel materials.

Paper Supplies, Reference Resources (Invitation for Bid)

Paper supplies, reference resources.

Multipurpose Copy Paper - White Only RFP

Provide multipurpose copy paper - white only.

Small Tool Calibration & Certification Services RFP

Seeking from from qualified calibration laboratories to provide comprehensive calibration, testing, repair verification, and certification services for small tools.

Fall City Community Septic Team Project Manager (Request for Proposals)

Provide fall city community septic team project manager.

Wastewater Treatment Division Leadership Training (Request for Proposals)

Provide leadership development, team development, strategic planning, and coaching services.

RFP-Actuarial Services for GASB 75 and GASB 101

King County is soliciting proposals from interested and qualified suppliers for actuarial services.

Cedar Hills Regional Landfill Pilot-Scale Micro-Electrolysis RFP

Plain Old Telephone Service (POTS) Replacement Solution (Request for Proposal)

Provide a modern, reliable, and compliant telecommunications solution to replace legacy copper Plain Old Telephone Service (POTS) lines and Centrex digital lines.

Shoreline Transfer Station Dust Control Project RFP

Construct mezzanine partition wall; misting system modifications and controls; mezzanine supply fan installation; demolition of dust hood and duct capping; air barrier repairs; hvac testing and balancing; general conditions; contractor engineering; apprenticeship utilization incentive.

Frp Puncheons RFP

Fiber Reinforced Polymer (FRP) puncheons for King County Park.