A new Government Accountability Office (GAO) report highlights the growing struggles within the U.S. Department of Defense’s space programs. Covering over 100 major defense initiatives, including 13 projects under the U.S. Space Force, the report exposes delays, cost overruns, and technology integration challenges that are stalling critical satellite programs for missile warning, secure communications, and low Earth orbit constellations. Despite promises from the Pentagon to accelerate procurement and embrace digital engineering, key tools like digital twins and end-to-end system models remain only partially deployed or absent in many projects.
The most troubled program, according to GAO, is Next Gen OPIR GEO-a geostationary missile warning system designed to replace the aging Space Based Infrared System (SBIRS). Originally budgeted at about $9.5 billion, the program has already exceeded its planned cost by around $340 million due to complex software, engineering hurdles with the sensors, and immature decisions that forced costly redesigns midstream.
The first satellite was assembled in January, but its launch remains uncertain. It depends on United Launch Alliance’s new Vulcan rocket, which is still grounded following an anomaly. For an early warning system, even a finished satellite on the ground doesn’t solve the urgent need. SBIRS replacement was already on a tight schedule, and this delay threatens to widen that gap.
Risks affecting Pentagon space programs
A similar story unfolds with Next Gen OPIR Polar, which will cover highly elliptical orbits. Its budget stands at $5.9 billion, with the first launch not expected before 2028. This project has become entangled in budget battles: the U.S. administration tried to kill it, but Congress restored funding. This political tug-of-war complicates contractor schedules and could reshuffle priorities.
Another notable challenge is the Protected Tactical Satcom-Global program, aimed at secure military communications satellites. Initially planned to build four satellites, the Space Force scaled back to two from SES and Viasat to test architecture concepts. The strategy reflects a growing Pentagon trend of leveraging commercial technology to cut costs and speed delivery by integrating off-the-shelf components with military systems. But GAO warns that mixing ”different worlds” brings familiar pitfalls: interface mismatches and incompatibilities can extend timelines and add millions in costs.
The total program budget is $2.9 billion for a planned constellation of 24 satellites. This hybrid commercial-military approach has become nearly standard in U.S. space procurement, but it faces limits. For secure, jam-resistant communications that must operate reliably in crises, the complexity and risk can quickly erode the benefits of ready-made solutions.
GAO also scrutinizes the Next Generation Operational Control System (OCX), the next-gen GPS satellite control platform. The Pentagon made a quiet decision to effectively cancel OCX by late 2025, only publicly revealing it in spring 2026. Years of schedule slips and budget growth have doomed the project. Instead, the Pentagon plans to patch and modernize the existing OCX ground system. This is not the first time a sprawling digital ground control upgrade has been shelved in favor of incremental improvements.
Launch capacity challenges amid provider and workforce shortages
The GAO report’s sharpest warning concerns launch capacity. The National Security Space Launch program, tasked with putting sensitive military and intelligence satellites into orbit, anticipates about 50 launches in its second phase and 85 more in the third. Yet the launch workforce is shrinking due to retirements, resignations, and hiring limits. This staffing crunch jeopardizes both ongoing missions and certification of new rockets.
With ULA’s Vulcan still grounded after its anomaly, and Blue Origin delaying certification of its heavy New Glenn rocket following a failed launch, the burden falls on already certified providers. That reduces scheduling flexibility. SpaceX stands out as an exception, having become the largest U.S. launch operator with over 130 orbital missions in 2025, but the Pentagon cannot rely indefinitely on a single provider for national security payloads.
Meanwhile, military satellites themselves grow increasingly complex and costly. SBIRS, Next Gen OPIR’s predecessor, endured similar delays and budget hikes. GAO’s past reviews show U.S. defense programs routinely run billions over budget and slip schedules, especially when integrating new payloads, software, and launch vehicles all at once. Such compound risks almost guarantee timeline overruns.
This is more than a budgeting headache for Washington. Driven by strategic competition with China and Russia, the U.S. Space Force is rapidly shifting missions to low Earth orbit and distributed constellations. Industry analysts at BryceTech note the global space launch market has grown by double digits recently, straining supply chains, engineers, and test facilities. GAO’s report suggests the Pentagon has already hit this capacity ceiling.
The next critical juncture arrives in 2026, when it will be clear if Vulcan returns on schedule and how quickly Blue Origin completes full certification. Delays in both will tighten the squeeze on existing launch resources, forcing further mission delays. That raises a stark reality: speeding up satellite orders doesn’t ease the bottleneck of getting them into orbit and operational.