Cornerstone Defense LLC

Cornerstone Defense LLC, a for-profit limited liability partnership based in Herndon, Virginia, operates predominantly as a subcontractor (79% of recent awards) to major defense primes, delivering software development, aerospace support services, and systems engineering to the Department of Defense. The vendor is a small business competing full-and-open with no set-aside designations across its portfolio.

Cornerstone's customer concentration is heavily tilted toward Navy and Air Force space programs. The top five funding entities account for 95% of awards by count; the Department of the Navy's Naval Sea Systems Command anchors the dollars with 4 awards carrying $15.28 billion combined potential value, while the Department of the Air Force Space Command Space and Missile Systems Center drives volume with 26 awards (dollar magnitude not disclosed in the source). The Naval Air Systems Command, the Missile Defense Agency, and GSA Federal Acquisition Service complete the customer set. The divergence between award-count and potential-value rankings reflects concentrated dollars on Navy programs and dispersed smaller task orders across Air Force space contracts.

Cornerstone holds a newly awarded prime position on the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ issued by the Missile Defense Agency on December 29, 2025, with a $151 billion ceiling and performance through December 28, 2035. Under SHIELD, Cornerstone will provide materials, labor, equipment, and facilities to support multi-domain defense system development, research and development, prototyping, systems engineering, weapon design, production, test and evaluation, and modernization efforts addressing airborne, missile, space, cyber, and hybrid threats. Cornerstone received its first SHIELD task order (Delivery Order, $500 initial value) on January 21, 2026. The vendor also places work under two indefinite delivery contracts with the Air Force (FA880621D0001, 12 task orders) and Navy (N0003920D0146, 4 task orders), as well as SeaPort-e and Seaport Next Generation vehicles.

Activity accelerated sharply in 2024 and 2025 (15 and 13 awards respectively, from 1–2 annually in prior years), positioning Cornerstone for substantial expansion under SHIELD. The subcontract footprint is dominated by Boeing, which accounts for most of Cornerstone's sub work across software development, protected tactical enterprise services, and space-based space surveillance sustainment. General Dynamics Mission Systems represents a secondary teaming relationship on Mobile User Objective System (MUOS) ground sustainment work. Across the portfolio, NAICS concentration centers on research and development in physical, engineering, and life sciences (15 awards) and engineering services (9 awards), with manufacturing and custom programming as secondary categories.

Service Contract Inventory data capture is minimal—four SCI records as subcontractor in FY2022 totaling 13.0 FTEs—and does not represent the vendor's full federal footprint or revenue stream, as SCI excludes classified work, the SHIELD IDIQ, and other non-reportable activity. Cornerstone's prime award footprint is nascent; the SHIELD vehicle represents the first major prime position and signals a shift from feeder-to-Boeing positioning toward direct contract authority in homeland defense technology development.

Cornerstone Defense LLC serves the Intelligence, Defense and Space communities of the U.S. Government. We specialize in cloud architecture, systems and network engineering, systems and network security, and application development. By hiring and maintaining highly skilled professionals, we are able to assist the government and integrator community clientele with the ability to deliver new and cutting-edge capabilities that support mission-critical objectives. We take pride in implementing solutions to help missions run seamlessly. We utilize our expertise in virtualization, cloud computing, and enterprise management to provide sustainable and secure solutions to complex problems. Cornerstone Defense is focused on providing core mission services and solutions with a value proposition that is fair and equitable. Our strong company culture minimizes turnover, keeping institutional and mission knowledge on our customers' programs.