Sound Transit Contracting Opportunities

This site provides information regarding contracting opportunities at Sound Transit. All guests to our site can view solicitations, bid results, and solicitation award information. To download solicitation documents and addenda, and to receive automatic notification of contracting opportunities, you must register with us. If you are not registered as a vendor please select the Register Tab at the top of the screen, and proceed as instructed.

Sound Transit is an Equal Opportunity Employer and encourages Minority, Women and Disadvantaged Business Enterprises to participate in the competitive procurement process. Firms are also advised that Sound Transit expects contractors, consultants, and vendors to adhere to certain Sound Transit policies while on Sound Transit's premises or when communicating with Sound Transit employees. In addition to advertising contract opportunities here on the agency's solicitation web site, it is also Sound Transit's policy to advertise solicitations greater than $100,000 on in the Daily Journal of Commerce. In addition, this site is intended to meet the requirements of RCW 39.04.155 and to meet the Small Works Roster requirement of RCW 39.04.150.

While Sound Transit is extremely confident in the full functionality of this system, as a legal matter, notification services offered through the site are not guaranteed and users of the notification system are ultimately responsible for reviewing postings to the site. Sound Transit disclaims all liability for damages caused by the use of this site or the information it contains.


Sound Transit is replacing eBid with a new solicitation management service provider, In order to continue receiving solicitation notifications about Sound Transit business opportunities Vendors and Contractors are required to register on our Biddingo website (link below).
This service is provided for free to Sound Transit vendors and contractors. Note that Biddingo does offer separate subscription-based services, however, as it relates to Sound Transit’s solicitation opportunities, there is absolutely no cost to vendors.

PLEASE REGISTER NOW by clicking here:

Once registered Vendors and Contractors will:

  • Receive email alerts about upcoming Sound Transit business opportunities beginning Wednesday, November 21st based on their selected business classifications.
  • Download solicitation documents
  • Receive solicitation related notifications (i.e. addenda)
  • Submit questions related to our solicitations
  • Be provided instructions on how to submit proposals

Important Dates to Remember:
  • Wednesday, November 21st – New solicitations will be advertised on Biddingo
  • Tuesday, December 4th - Vendor On Site Support Day (At Sound Transit)
If you need more information, please contact Biddingo at 323-206-4114 or 416-756-0955 or by email at


Sound Transit posts notices of the intent to award without competition for non-competitive awards that exceed $100,000 for seven working days. Such notice of Sound Transit's intent to award a contract without competition through negotiation with only one source is done under
12/10/2018 11:43 AM Pacific   

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