The C1 building is an existing three-story building located between Concourses C and D at Seattle-Tacoma Airport (SEA). The expansion project will expand the C1 building vertically and create needed facilities to meet current unmet demand for passengers and tenants. Triunity staff are currently serving as the special systems project manager on the C1 expansion project. Triunity is providing PM oversight of the special systems design and construction. This includes design and constructability reviews, stakeholder management, multidisciplinary coordination, project scoping and client communications.