Senior Stormwater Engineer

Company Description

KPFF, a multi-office, multi-discipline engineering firm, is committed to Excellence, Trust, Relationships, Stability, and Passion. For over 60 years KPFF has been providing creative solutions and excellent client service for a diverse range of projects and industries. Our 1,400 professionals in 30 offices nationwide thrive in a decentralized structure, offering abundant flexibility and numerous opportunities for professional growth. At KPFF, join a legacy of excellence where every team member has the opportunity to contribute to innovative solutions and meaningful projects.

To learn more about us and the projects we work on, visit our website at

KPFF Seattle’s Transportation Team focuses on designing infrastructure that moves people and connects communities across the region. We work on a wide range of transit and transportation projects, including roadway and trail improvements, fish passage enhancements, and major infrastructure efforts throughout the Puget Sound and Pacific Northwest. Our team supports projects from early planning and feasibility through design, permitting, and construction.

We collaborate closely with public agencies, transit authorities, contractors, and fellow engineers to deliver thoughtful, sustainable solutions that improve mobility, restore natural systems, and strengthen the built environment.

Located in downtown Seattle, our office is seeking an experienced Senior Stormwater Engineer to support major projects throughout the Pacific Northwest. This position will support transportation projects and associated hydraulic elements, primarily stormwater design. This position requires the candidate to utilize their expertise in water resources engineering related projects, including stormwater facilities design; surface water hydrology and hydraulic analysis and design;

culvert and bridge hydraulics; stream and habitat restoration analysis and design; preparation of engineering and construction plans, specifications, and estimates; and coordination with regulatory agencies for project permitting. It will be the responsibility of the position to perform engineering design and to provide a high-quality product to our clients.

• Support a wide range of engineering projects for roadway and transit improvements, bicycle and pedestrian facilities, site development, fish passage, and ecological restoration.
• Perform stormwater related design, analysis, and report generation for roadways, bridges, airports, and related transportation infrastructure.
• Provide detailed engineering calculations for design of stormwater and fish passage facilities.
• Create hydrologic and hydraulic models.
• Responsible for design of water resources systems and facilities including hydraulic analysis for stream crossings and evaluating for fish passage and scour.
• Knowledge of local, state, and federal fish passage and stormwater management designs standards.
• Create stormwater, stream, conveyance designs, and associated grading in AutoCAD Civil 3D utilizing 3D surfaces and pipe networks.
• Interface with clients and public agencies on an as-needed basis.
• Coordinate with teammates on projects to ensure proper and timely execution.
• Work in a highly flexible, team-oriented environment.

• 7+ years of experience in design, planning, and implementation of stormwater and hydraulic elements on transportation projects specific to hydraulic and hydrologic (H&H) design.
• Bachelor’s degree in Civil Engineering with Engineering in Training certification.
• Experience with design of stormwater conveyance, flow control, water quality treatment, and low impact development BMPs.
• Project experience with fish passage design projects including H&H modeling, culvert design, stream restoration, and associated civil design.
• Design experience using Washington State stormwater design manuals; DOE SWMMWW, WSDOT HRM, WSDOT Hydraulic Manual, WDFW Crossing Guidelines.
• Proficiency and experience using hydrologic and hydraulic modeling software; MGSFlood, WWHM, Stormshed 3G, and HEC-RAS.
• H&H design calculation experience including conveyance sizing, basin hydrology, culvert sizing, and…