Executing large-scale public infrastructure and mission-critical private developments. From rapid transit corridors to heavy civil site preparation and underground utilities.
Jansen is a heavy civil general contractor specializing in complex, large-scale infrastructure across both the public and private sectors. Built on a foundation of operational excellence and a highly skilled workforce, we execute demanding mass excavation, deep underground utilities, concrete roadway paving and structural concrete packages. We are defined by hard work, straightforward execution, and a commitment to delivering quality safely and on schedule, no matter the project's complexity.
More About JansenI consider Jansen an exceptional company. Their commitment to their employees and safety on the job site echoes through the quality work that they perform.
Five core sectors, one standard of execution. From mission-critical private development to the public infrastructure the region depends on.
Explore MarketsWe build the best teams in the industry —
and give them the tools to do exceptional work.
Jansen was awarded the construction contract to build infrastructure for SDOT and King County Metro's RapidRide J Line, connecting the U District to Downtown Seattle. Beneath the transit corridor: complex utility relocations, deep excavation, and site grading executed under live city streets on a fixed federal schedule.
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