T-Mobile, Headquarters Campus Renovation

Bellevue, Washington, United States

Project Summary

MGAC has been collaborating with T-Mobile since 2018 to deliver its $160M Bellevue campus renovation. The ambitious program transforms the 1,400,000 SF office headquarters for 6,000-plus employees into a sustainably-focused, team-first, environment that celebrates T-Mobile’s growing workforce and welcomes visitors to a space that reflects the brand’s innovative spirit.

Key components include the introduction of a 40,000 SF amenity centerpiece with dining options, gaming, and collaborative meeting space; outdoor areas for corporate events, team meetings, and employee recreation; and an innovative and dynamic customer experience center. New skybridges, complete with meeting spaces and dining options, seamlessly blend form and function to connect employees and the campus in imaginative ways.

MGAC's Role

As program manager, MGAC is a true extension of the T-Mobile team, overseeing concurrent cross-country construction projects on an ongoing basis. MGAC manages all project partners, budgets, and timelines, and has provided cost and risk management, FF&E procurement, technology solutions, and change management communication and messaging to bring these unique and highly visible projects to fruition.


Throughout the Headquarters project, flexibility was key as the team worked through two ownerships of the site, two senior leadership teams, five distinct pieces of property, and the merger of T-Mobile and Sprint. To ensure minimal employee disruption, projects were phased, and as the working world changed alongside the pandemic, MGAC remained agile to keep moving forward.

Every feature of the transformation is designed to empower and attract industry-leading talent. The scope and scale of this work were vast, and no detail was too small in ensuring the employee training center, food hall, fitness center, mother’s rooms, multi-faith rooms, outdoor fire pits, bocce ball courts, and the many flexible workspaces were nothing short of spectacular.

The executive floor project—with every office individually designed— included demolition, new air distribution, and custom lighting, in addition to new glass walls, meeting rooms, pantries, and a standout reception space. The project underwent more than 40 design iterations before a final layout was selected. Construction was expedited, and every furniture and fixture piece was tracked—and in some cases re-selected—to navigate supply chain issues and bring the project to the finish line.

Success Factors

The renovated Headquarters is unmistakably T-Mobile, and has transformed the campus from a disparate collection of buildings into an integrated network of enriching working environments where every detail is intentional. Many of the new spaces are brilliantly adaptable, from a 1,000 SF grand staircase that doubles as amphitheater seating to skybridges that offer new mobilities and gathering spaces.

At every turn, the campus fosters innovation and creativity to ensure a vibrant workplace for T-Mobile today and into the future. Amenity spaces, complete with outdoor games, a vintage Airstream trailer serving frozen yogurt, a pub, and a happy hour bar offer exciting ways for employees to connect and recharge and serve as tangible testaments to T-Mobile’s commitment to building an inspired, people-first workplace.