Boeing relocates Defense, Space & Security headquarters back to St. Louis, ending Arlington-based leadership era

Headquarters designation shifts to Missouri site with major engineering and production operations

Boeing has designated its St. Louis-area campus as the headquarters for its Boeing Defense, Space & Security (BDS) business unit, relocating the division’s headquarters function from Arlington, Virginia. The change returns the defense unit’s headquarters designation to St. Louis, where it was based for two decades before moving in 2017.

Boeing’s defense headquarters shift comes as the company continues to position senior leadership closer to major engineering, manufacturing and production hubs supporting defense and space programs. Boeing said the St. Louis region is home to more than 18,000 employees across its business units, including Defense, Space & Security, Commercial Airplanes and Global Services.

What the St. Louis footprint includes

Boeing’s St. Louis-area operations have long served as a major center for defense aircraft production, modernization and sustainment work. The company has also highlighted engineering and support functions in the region, including supply chain and quality capabilities, along with advanced prototyping and virtual warfare-focused activities tied to its research and development efforts.

• Defense aircraft and munitions production and modernization
• Engineering and manufacturing support functions
• Services and sustainment activities
• Advanced prototyping and virtual warfare-focused capabilities

Expansion plans and construction timeline

The headquarters announcement coincides with ongoing work tied to a large-scale expansion of Boeing’s St. Louis manufacturing campus. A design, engineering and environmental services contract for the project described a multi-billion-dollar effort expected to add about 1.1 million square feet of facilities and to be completed in multiple phases between 2026 and 2030. The expansion has been described as supporting advanced assembly facilities and associated post-assembly operations intended for future aircraft programs.

Recent labor context in the Midwest defense workforce

The shift also follows the resolution of a significant labor disruption affecting Boeing’s defense manufacturing workforce in the region. In late 2025, several thousand unionized defense workers in the St. Louis-area footprint approved a five-year labor agreement that ended a strike that began in August 2025. Reported terms included wage increases over the life of the contract and a ratification bonus.

The headquarters designation change returns the defense business’s leadership center to the same metropolitan area that anchors one of Boeing’s largest defense production and engineering workforces.

What changes—and what does not

The headquarters move is a corporate designation that re-centers BDS leadership in the St. Louis region. It does not, by itself, specify changes to specific defense programs, production lines, or government contract commitments. Boeing continues to maintain major defense and space operations in multiple U.S. states, while St. Louis remains one of the company’s most significant concentrations of defense-focused engineering and manufacturing activity.