Sigma Defense Systems LLC

Sigma Defense Systems LLC, a Georgia-based for-profit limited liability company, is a prime contractor delivering intelligence, surveillance, and reconnaissance (ISR) systems, tactical communications infrastructure, cross-domain solution capabilities, and systems engineering services to the Department of Defense across ISR, signals intelligence, and network integration programs. The vendor operates as a full-and-open prime on 98% of recent awards and competes predominantly outside set-aside categories, though it holds two Total Small Business set-asides among recent deliveries ($41 million for Global Strike Command INDOPACOM system updates in September 2024 and $45.2 million for Air Force STINGRAY FMV system updates in July 2024).

Sigma's customer concentration is heavily weighted to the Air Force and DISA across two distinct funding streams. The top five customer agencies by combined potential value account for 87% of recent dollars: the Department of the Air Force leads with 13 awards and $1.04 billion in potential value; the Defense Finance and Accounting Service (funding vehicle) anchors 22 awards worth $989.6 million; Air Force Defense Finance and Accounting Service (distinct from DFAS proper) accounts for 15 awards at $560.9 million; DISA carries 27 awards at $194.4 million; and Naval Sea Systems Command holds 2 awards at $110.5 million. This three-way split between Air Force direct, Air Force-funded DFAS orders, and DISA masks significant concentration in ISR modernization and sensor data transport infrastructure — the vendor's core capability area. Recent representative work includes a $104.5 million time-and-materials delivery order from Naval Sea Systems Command (awarded August 2024) for systems engineering, network engineering, software engineering, and cybersecurity supporting NSWC PCD C4ISR portfolio operations at Lynn Haven, Florida through August 2029; a $51.4 million firm fixed-price Army Intelligence Surveillance and Reconnaissance Task Force upgrade (PEO Aviation, April 2024) with integration responsibility across ISR Task Force modernization; a $32.2 million firm fixed-price delivery order (Naval Information Warfare Systems Command, July 2024) for lead integrator services supporting USSOCOM, Air Combat Command, and AFLCMC NIWC operations at Tampa, Florida; and a $14.5 million firm fixed-price delivery order (Office of the Secretary of Defense, March 2026) for Special Operations low-intensity conflict capabilities.

Sigma holds positions on two major federal vehicles. The STINGRAY III IDIQ (47QFLA19D0010), managed by DISA, carries 73 task orders worth $340.2 million in combined potential value and funds ISR systems, cross-domain solutions, spares, and logistics support across DISA, USSOCOM, Special Operations Command Joint Task Force, and overseas combatant commands (USCENTCOM, USINDOPACOM, USAFRICOM, USEUCOM). The second-largest vehicle is Indefinite Delivery Contract 47QFLA21D0007, with 21 task orders totaling $452.9 million, supporting similar ISR and tactical communications missions. Sigma also holds a $950 million Advanced Battle Management System (ABMS) multiple-award IDIQ with the Air Force (awarded September 2022, expires May 2030), a $249.7 million Naval Information Warfare Systems Command development and technical management IDIQ for ISR services, a $250 million single-award IDIQ for Joint AISR Sensor Data Transport Infrastructure lead integrator services, a General Services Administration OASIS+ Unrestricted multiple-award contract awarded December 2024 with a multi-billion-dollar ceiling through December 2029, and the ASTRO government-wide platform-services GWAC through GSA FEDSIM (awarded November 2021, expires November 2031).

Activity has remained relatively flat in the past three years (11–13 awards annually from 2022 through 2024, dropping to 3 in 2025 and 2 in 2026) but the dollar footprint remains large. Twenty-seven awards worth $351.3 million in combined potential value reach ultimate completion within the next twenty-four months, creating recompete pressure across STINGRAY III, ABMS, and DISA technology-refresh orders.

Sigma operates with a subcontractor base across prime deliveries. Named subcontractors on recent large awards include Saab Inc. (Autonomy division, Grizzly Cloud 2.0 ISR data management platform integration for Air National Guard MQ-9 ISR integration), Kihomac Inc. (a veteran-owned, minority-owned small business providing ISR integrator program management support on Army CECOM TENCAP and DISA orders), Zygos Consulting LLC (small business program and project management on ISR integrator roles), Mission Solutions Group Inc. (STINGRAY III ASEC and AFRICOM field service representative support), Cubic Digital Intelligence Inc. (UVDS and Cross-Domain Solution infrastructure for DISA INDOPACOM and overseas theater operations), Noblis Inc. (24/7 help desk support and cybersecurity documentation for ASEC infrastructure), and Deloitte Consulting, SAIC, Concurrent Technologies Corp, and others providing systems engineering, logistical planning, and program management across Naval Sea Systems Command C4ISR portfolios. Across SCI-reportable prime contracts, subcontractor hours represent a material share of delivery. Service Contract Inventory captures only one SCI record in FY2024 (a sub-award position) with 0.1 FTEs, but SCI is a partial view excluding goods, classified work, and the majority of Sigma's ISR and tactical communications hardware and integration revenue. The corporate structure includes subsidiaries Middle Bay Solutions LLC, Aries Defense LLC, Juno Technologies LLC, and Solute — capability and acquisition alignments not detailed in the source.