Building the next 50 years of passenger experience

Upgrading a critical
international gateway

The Port of Seattle oversees one of the nation’s busiest airports, Seattle-Tacoma International Airport (SEA), which serves over 50 million passengers annually and connects the Pacific Northwest to destinations across the globe. The Port is committed to expanding capacity, improving the passenger experience, and ensuring long-term infrastructure resilience while embedding equity, sustainability, and economic growth into every capital program. With international travel demand continuing to grow and travelers seeking seamless and comfortable experiences, the Port of Seattle faced the urgent need to upgrade one of SEA’s most critical international gateways.

Client

Port of Seattle

Solutions

Advisory | Delivery

End Market

Aviation

Program Total

$2.2B

Reimagining SEA's
South Concourse

The South Concourse, an existing three-story building with seven levels from sub-basement to penthouse, was originally built in 1973 and expanded in 1984. Since then, it has seen limited capital reinvestment while sustaining heavy passenger use, particularly by international travelers. Outdated systems, seismic concerns, and constrained passenger amenities have created pressing needs for renewal.

To address these issues, the Port of Seattle is undertaking the $2.2B South Concourse Evolution (SCE) program—a 12-year effort to extend the concourse’s useful life by 50 years while modernizing it for future generations.

The program’s objective is to deliver structural and seismic upgrades and new building systems and create an enhanced passenger experience, all while keeping the airport operational 24/7 and minimizing disruption to airlines, tenants, and travelers. Consertus was selected to provide construction management expertise through the GC/CM delivery method, guiding the program from design through delivery.

An integrated approach
to GC/CM delivery

Consertus will deliver construction management services to support the Port of Seattle throughout the South Concourse Evolution program. Building on our deep experience with GC/CM delivery in active aviation environments, our team brings a disciplined approach that combines technical oversight, administrative support, and stakeholder coordination.

Our integrated team approach—rooted in collaboration and proactive problem-solving—ensures the Port is equipped to manage complexity, minimize operational impacts in a 24/7 airport, and deliver long-term value for travelers.

Our work includes

Construction managers will provide day-to-day leadership, coordinating contractors, consultants, and Port staff to ensure all work is executed safely, efficiently, and in alignment with project goals.

Project assistants will manage critical project controls, including RFIs, submittals, correspondence, and reporting, while ensuring communication remains clear across Port departments, tenants, and stakeholders.

Construction inspectors will provide eyes on the ground, verifying that work is performed safely and in compliance with technical specifications while documenting progress through detailed logs and reports.

Estimators and schedulers will provide specialized expertise to review contractor proposals, prepare independent cost and schedule analyses, and support the Port in negotiating fair outcomes.

Reinforcing leadership
for a global hub

The South Concourse Evolution program will transform how millions of travelers experience SEA. Once complete, the facility will meet current seismic and safety standards while offering world-class amenities tailored for international passengers.

For the Port, this renewal extends the facility’s useful life by 50 years and reinforces SEA’s position as a leading global hub. For passengers, it delivers a more comfortable, convenient, and efficient journey.

By investing in safety, sustainability, and community benefit, the Port is not only modernizing a building but also shaping the future of travel in the Pacific Northwest.