Doing business with us
We're building the future
Voters across the Central Puget Sound have charged Sound Transit with delivering the largest transit expansion in the country—including five Link light rail lines providing 116 miles of service, 45 miles of new Stride bus rapid transit routes, and Sounder train service connecting 14 stations over 91 miles.
It’s a truly transformative investment in our region’s future, and we can't build it with you: our industry partners, contractors, and vendors.
Explore contracting opportunities
You’ll find Sound Transit’s current and upcoming contract opportunities in our vendor portal, where you can also sign up for email notifications on projects and get guidance on submitting proposals.
Delivery standards and design documents
Sound Transit’s project delivery standards govern how we design, construct and upgrade infrastructure and systems.
Technical assistance for small businesses
Get information about our on-demand Technical Assistance Program designed to help small businesses grow their capacity.
Procurement, contracts and agreements
Learn more about how we contract for projects and services.
How procurement works at Sound Transit
Learn about our projects
See where we’re building new transportation infrastructure across Pierce, King, and Snohomish counties in the decades to come.
Explore our system expansion map
Upcoming events
There are no events scheduled at this time. Please check back later.
Project Labor Agreement
Our Project Labor Agreement promotes commitment to labor stability and a local workforce, apprenticeship and employment goals for people of color and women, and non-discrimination and fairness in employment for union and non-union contractors and craft workers.
Project leadership
Get to know the leaders behind some of Sound Transit’s current projects to expand light rail and bus rapid transit across our region.