New Office & Administration Facility at 2821 South 154th Street, Seatac, WA 98188

Welcome to SCI Infrastructure LLC and SCI Companies!  We are the Northwest's Premier Infrastructure & Heavy Road Contracting Company.  Recently, we have completed our new office development to serve you better.  The facility was completed in August of  2017 and is the new headquarters for SCI Infrastructure's Managment Teams.  The estimating departments, project managers, financing and billing services are located at the headquarters in SeaTac, Washington just north of the Sea Tac Airport.  

For more information please call us at 206 242-0633, or email us at and we will respond!

Thank you for visiting our website today and we look forward to  "Building the Northwest" with you soon.