Space Systems Command's Commercial Space Office in Chantilly, Virginia awarded Inmarsat Government Inc. a $307,102,288 firm-fixed-price contract on May 8 for global communication connectivity providing U.S. military forces access to multi-orbit commercial satellite communications across all commercially available frequency bands. The contract, designated FA254126DB001, covers worldwide performance and runs through March 16, 2031 — a five-year vehicle during which the Department of Defense will draw on Inmarsat's constellation of geostationary and non-geostationary orbit satellites to supplement government-owned military SATCOM capacity. Inmarsat Government is the U.S. federal government subsidiary of Inmarsat, the British satellite communications operator that manages one of the world's most extensive commercial satellite networks, spanning L-band, Ka-band, and S-band frequency assets in geostationary orbit with expanding investments in low Earth orbit capacity through its ORCHESTRA multi-orbit strategy.
The Commercial SATCOM Strategy Behind the Award
Space Systems Command's Commercial Space Office was established to professionalize and expand the Department of Defense's use of commercial satellite communications capacity — a market that has historically been managed in an ad hoc manner across individual service components and combatant commands. The office's mandate is to negotiate enterprise-level agreements with commercial SATCOM providers that give military users access to diverse satellite constellations at better aggregate pricing than individual task order buys, while building the redundancy and resilience that the PACE architecture — Primary, Alternate, Contingency, Emergency communications paths — demands for operational connectivity. Inmarsat's multi-orbit capability is central to this value proposition: a single provider offering geostationary L-band connectivity for legacy maritime and aeronautical terminals alongside Ka-band high-throughput capacity for mobile users, with emerging LEO capacity for low-latency applications, gives military planners a single contractual relationship that covers a wider range of mission requirements than any single-orbit provider could address.
The $307 million five-year contract is sized to cover sustained military demand for Inmarsat's services rather than a specific program of record, reflecting the Commercial Space Office's intent to create a standing commercial SATCOM capacity that operational users can draw on as mission requirements emerge. This type of enterprise commercial SATCOM contract is different from the older approach of leasing specific transponders or bandwidth blocks — it provides access to Inmarsat's full network capacity on a managed service basis, with connectivity delivered to military terminals without military operators needing to manage the underlying satellite scheduling.
Inmarsat in the Defense Market
Inmarsat Government has built a substantial U.S. defense business over the past two decades, particularly in maritime and aeronautical SATCOM for platforms that operate outside the geographic coverage of military satellite systems or require commercial connectivity as their primary or backup link. The Navy's Fleet Broadband program — which provides broadband connectivity to surface combatants through Inmarsat's GEO SATCOM constellation — established Inmarsat Government as a trusted provider for operational naval communications. The Air Force has used Inmarsat's SwiftBroadband service on aircraft that operate in regions where military SATCOM footprints are limited. The new Space Force contract builds on these existing relationships but represents an expansion into a multi-domain enterprise contract that covers all U.S. military users rather than a specific service's platforms. Inmarsat's parent company was acquired by Viasat in 2023, creating a combined entity with both military and commercial SATCOM assets that spans GEO, MEO, and LEO orbits — a scale that gives the government customer better coverage options than Inmarsat alone could offer before the merger.
What It Means for Contractors
The Inmarsat Government commercial SATCOM contract represents one path the Space Force is pursuing to diversify its satellite communications access; parallel contracts with other commercial providers are expected to follow.
- Defense integrators developing military terminal systems — particularly SATCOM-on-the-move and expeditionary communications terminals — should engage Inmarsat Government's defense programs office to ensure their terminal designs are compatible with the frequency bands and network management protocols supported by the new contract vehicle, as platform compatibility will determine which terminal programs can access the commercial capacity this contract funds.
- Firms providing SATCOM network management, waveform development, or cryptographic key management services for commercial SATCOM integration into military networks should engage Space Systems Command's Commercial Space Office directly; the enterprise SATCOM contract creates a demand signal for integration services that the government does not self-perform.
- Competing commercial SATCOM providers — including SES, Telesat, ViaSat's separate military programs, and the emerging Starlink Government constellation — should monitor future SSC Commercial Space Office solicitations closely; the Inmarsat award is one vehicle in what is expected to be a portfolio of commercial SATCOM contracts covering different frequency bands and mission sets.
- Defense electronics firms developing SATCOM terminals that interoperate with commercial constellations should review the Commercial Space Office's published commercial SATCOM strategy document, which identifies priority capability gaps where commercial access contracts like this one are expected to drive near-term terminal procurement requirements.
Multi-Orbit Architecture and SATCOM Resilience
The Space Force's strategic rationale for multi-orbit satellite communications contracts is rooted in a threat assessment that treats any single orbital regime as potentially contested in a high-end conflict with a peer adversary. Adversary direct-ascent anti-satellite weapons, co-orbital inspection satellites, directed energy systems, and cyber intrusion capabilities all pose different levels of risk to different orbital regimes — geosynchronous orbit is vulnerable to kinetic and directed energy attack but not to co-orbital inspection; low Earth orbit constellations are individually less vulnerable to kinetic attack but present a larger target surface for cyber intrusion given the larger number of satellites and ground stations involved. By contracting for satellite communications capacity across geosynchronous orbit, medium Earth orbit, and low Earth orbit simultaneously, the Space Force creates a resilient architecture in which the loss or degradation of any single orbital layer can be partially offset by increased reliance on the remaining layers. Inmarsat Government's I-6 satellites in geostationary orbit, L-band capacity in medium Earth orbit, and its connectivity to Viasat's ViaSat-3 constellation provide the layered orbital diversity the Space Force requires. The $307 million award funds the capacity and terminal integration needed to make that multi-orbit architecture operationally usable for tactical and strategic military users, including classified missions that may not be fully described in the public contract announcement.