Mandex Inc.

Mandex Inc. Headquarters Division, a service-disabled veteran-owned small business (SDVOSB) subsidiary of Mts3 Inc., delivers electronic security systems installation, sustainment, and engineering services to the Department of Defense and federal civilian agencies as a prime contractor, holding seats on three multi-billion-dollar GWAC and IDIQ vehicles and competing predominantly full-and-open rather than under small-business set-asides despite its SDVOSB designation.

Mandex operates from Fairfax, Virginia, as a for-profit veteran-owned entity under primary NAICS 541330 (Engineering Services) with secondary activity in security systems services (NAICS 332312). The vendor's 88-category GSA Schedule labor portfolio spans technical analyst and logistician roles at $42–$73/hr through senior security systems engineering at $203.61/hr, with bachelor's degrees and zero to twelve years' experience but no security-clearance roles offered. Across SCI-reportable service contracts from FY2022–FY2024, the vendor invoiced $42.8 million in combined federal services revenue (prime records), with median government-paid rates around $84/hr and a 90th-percentile ceiling near $101/hr; FTE delivery showed volatility across this window ($22.3 million, 101 FTEs in FY2022; $4.8 million, 6,763 FTEs in FY2023; $15.7 million, 74.3 FTEs in FY2024), reflecting classification, scope, and reporting-threshold variations rather than steady staffing.

Customer concentration centers heavily on Naval commands. The Department of the Navy Information Warfare Systems Command anchors 602 awards valued at $2.37 billion in combined potential value, followed by the Department of the Navy Naval Sea Systems Command (24 awards, $10.02 billion), and the Marine Corps (25 awards, $41.5 million). Naval customers account for roughly 90% of Mandex's recent award footprint by count; by dollar value, Naval Sea Systems Command and GSA Federal Acquisition Service together represent 59% of combined potential value across all 1,649 awards (prime and sub) in the source. The vendor has served 33 distinct customer agencies across the last five years, but Navy and related Defense entities dominate the pipeline.

Mandex holds four major vehicle positions. The GSA OASIS+ Small Business and OASIS+ SDVOSB IDIQs carry placeholder ceilings and performance through FY2029, reserving $999,999,999,999 each for small-business and SDVOSB-eligible task orders, respectively. The Missile Defense Agency's Scalable Homeland Innovative Enterprise Layered Defense (SHIELD) multiple-award IDIQ, awarded December 29, 2025, carries a $151 billion ceiling through December 2035 and competes full-and-open with no set-aside; Mandex received an initial $500 task order the same day, demonstrating vehicle operationalization. The Defense Logistics Agency J6 Enterprise Technology Services 2.0 (JETS 2.0) IDIQ carries a $11.9 billion ceiling through October 2034 and supports enterprise-technology sourcing across DLA's Land and Maritime division. Mandex also holds a Naval Sea Systems Command single-award $6 million IDV (through May 2030) for integrated electronic security system sustainment and software upgrades, plus a Defense Logistics Agency electronic-locks blanket purchase agreement ($2.9 million ceiling, expired May 2025).

Representative prime work includes a $99.96 million cost-plus-fixed-fee delivery order from Naval Information Warfare Systems Command (awarded December 6, 2023, under Seaport-NXG) for management, systems engineering, finance, logistics, and quality assurance to the Defense Health Agency covering triennial technical refresh of military treatment facility infrastructure at 130 facilities worldwide through December 2028. A $249.8 million sole-source purchase order from Naval Sea Systems Command (awarded December 23, 2024) funded engineering services for sonar array design evaluation and transducer technologies at Naval Undersea Warfare Center Newport, Rhode Island. A $1.25 million firm-fixed-price delivery order from Naval Sea Systems Command (awarded July 5, 2023, under GSA Multiple Award Schedule, set-aside Total Small Business) covered intrusion detection and access-entry control system upgrades at naval warfare command facilities in Connecticut and Rhode Island. More recent orders include $113 thousand (February 10, 2026), $77.5 thousand (September 22, 2025), and $34.7 thousand (October 6, 2025) delivery orders from Naval Sea Systems Command for integrated electronic security system sustainment and building-access software upgrades at Naval Station Panama City, Florida, each firm-fixed-price with completion dates between April and May 2026.

Sub engagement spans minimal formal subcontracting across SCI records (15% average sub-hours share on prime contracts, six named subcontractors) but includes two named sub awards: Mandex performed virtual health labor support to Accenture Federal Services LLC on a Bureau of Medicine and Surgery program (awarded December 22, 2023), and cyber security and data-analysis work to Georgia Tech Applied Research Corp on a Department of Defense Program Executive Office program (awarded January 28, 2022).

The recompete cliff shows minimal near-term exposure: only one award (valued at $21 thousand) carries ultimate completion within the next twenty-four months. Award velocity remains modest, averaging five to eight awards per year across 2022–2025. The consolidated portfolio — 1,649 awards with $29.42 billion in combined potential value but only $592 million obligated (2% execution rate) — reflects the IDIQ and vehicle-based nature of Mandex's footprint, where ceiling values dramatically exceed near-term spend, and the bulk of potential value sits unexercised within multi-year task-order windows.

MANDEX core capabilities are Program Management, C4ISR Systems, GCCS-J I3, IT, Virtualization, IA, IV&V, Certification and Accreditation, and Advanced Concept Technology Demonstrations, ESS, Access Control Systems, CCTV Systems