Accelint Mission Solutions, LLC

Highbury Defense Group, a Service Disabled Veteran Owned Small Business based in San Diego, California, operates as a prime contractor on Navy and defense agency programs, delivering program management, cybersecurity engineering, and technical support services under cost-plus-fixed-fee and firm-fixed-price delivery orders placed against Seaport-NXG and emerging defense platforms. The vendor competes full-and-open (no set-asides across the award footprint) and structures its delivery model around extensive subcontracting — across SCI-reportable prime contracts, subcontractors perform 44 percent of contractor hours, with 47 named subcontractors reported.

Highbury's customer base is entirely within the Department of the Navy and the Department of Defense Missile Defense Agency. The Naval Information Warfare Systems Command dominates the footprint with 17 awards valued at $401.2 million in combined potential value, anchored by two large delivery orders under Seaport-NXG: a $179.8 million headquarters executive and program management support contract issued September 14, 2023, running through March 17, 2029, and a $72.5 million cybersecurity, engineering, and technical support order issued August 13, 2021, completing August 12, 2026. Naval Sea Systems Command holds four awards carrying $10 billion in combined potential value, derived largely from Highbury's recent December 29, 2025 award as a prime contractor on the Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ — a $151 billion vehicle extending through December 28, 2035 with initial delivery at $500. The Missile Defense Agency holds two awards totaling $500. Across all awards, 100 percent of combined potential value flows through these three Navy and DoD customers.

Highbury's primary vehicle is Seaport-NXG, where 14 task orders carry $318.1 million in combined potential value. The vendor also sits on SeaPort-e (3 task orders) and has now been added to the SHIELD IDIQ. Activity shows concentration in recent years — four awards in 2021, then a gap to two awards in 2023, followed by seven awards in 2024 — with only two awards facing ultimate completion inside the next twenty-four months (combined potential value $75.9 million).

Service Contract Inventory-reported invoicing from prime contracts totaled $72.4 million across FY2022–FY2024, with $29.3 million in FY2022, declining to $23.1 million in FY2023, then $20.1 million in FY2024. FY2024 SCI data reflect 1,073 FTEs delivered on the largest contract (Naval Information Warfare Systems Command headquarters support) across 2.2 million contractor hours at a blended rate of $8.98 per hour; that single engagement dwarfs other SCI records in scale. Across the broader prime contract portfolio, government-paid hourly rates run from a 10th percentile of $40.25/hr through a median of $65.34/hr to a 90th percentile of $83.29/hr, reflecting a mix of program-management-focused (lower-rate) and engineering-focused (higher-rate) delivery streams. In its subcontractor role, Highbury performs program management, cost estimating, system engineering, cybersecurity, and logistics support for Booz Allen Hamilton on five Navy awards (PEO C4I programs and IISS initiatives) issued between July 2024 and November 2024, and delivers PMO support to G2 Software Systems on defense maritime platform acquisition work.