When Vendor Lock-In Helps vs. Hurts Your Program

By Andrew Park | 2025-08-19

Vendor lock-in has sunk some programs and made others heroes. What separates the two? Throughout my career working with defense programs, I've observed these same dynamics play out across different vendors and contracts.

The F-35 program perfectly illustrates how this cycle begins. In the early 2000s, the F-35 Joint Strike Fighter was awarded to Lockheed Martin with a contract structure that gave the prime contractor extensive control over the aircraft's technical baseline. Lockheed owned the physical and software architecture, detailed CAD models, interface control documents, and mission system source code. This arrangement created high vendor lock-in. The U.S. government had to go through Lockheed for virtually every upgrade, simulator build, or maintenance tooling change.

Over time, this control became a major friction point. Simulator delays arose because 3rd parties couldn't get high-fidelity geometry and performance data without Lockheed's involvement. Upgrades were sole-sourced, slowing capability integration and keeping costs high. Subsystem improvements couldn't be competitively sourced, leaving the Air Force tied to Lockheed's timelines and pricing. By the mid-2010s, frustration was widespread as vendor lock-in slowed innovation, drove up sustainment costs, and limited the platform's adaptability.

The B-21 Raider program, awarded to Northrop Grumman in 2015, was in part a reaction to this frustration. The Air Force demanded a government-owned architecture, strong use of modular open systems approaches (MOSA), and data rights that would allow competition for subsystems and upgrades. By keeping the technical baseline under government control, they aimed to avoid the bottlenecks and sole-source dependencies of the F-35 experience.

The recent F-47 award to Boeing continues this trend. The Air Force has again emphasized government-owned architecture and data rights to ensure greater freedom to choose vendors for upgrades, sustainment, and integration.

This shift becomes clear when comparing recent programs:

Table 1: Vendor Lock-In Contrast Across Recent Programs

The USG's "Immune System" Countermeasures to Vendor Lock-In

Over the past two decades, the government has introduced multiple mechanisms to limit vendor lock-in. These include:

• MOSA (Modular Open Systems Approach) to define clear, open interfaces between subsystems

• Data Rights to allow competition for upgrades and sustainment

• Architectures (USG-owned) to prevent single vendor control of integration baseline

• TDPs (Technical Data Packages) to enable competitive manufacturing and maintenance

• ICDs (Interface Control Documents) held by the government to enable third-party development

• OMS (Open Mission Systems) software standards to make avionics and mission systems more plug-and-play

These countermeasures are like an immune system response to a threat. The pattern reminds me of how an immune system works, dormant when the body's healthy, but activated when there's a threat. When a vendor impedes mission success, the government deploys new rules, structures, and controls.

The Tradeoffs of Highly Modular Architectures

While these protections can prevent a repeat of the F-35 experience, they come with their own costs to mission success.

Ordered by impact on mission success:

1. Innovation drag: Any change to a USG-owned interface often requires lengthy approval and coordination. The government's slow, bureaucratic processes can delay capability upgrades that are urgently needed for mission success.

2. Integration complexity: More subsystems from different vendors means more integration risk and more time spent troubleshooting interoperability issues.

3. Testing burden: Every component swap or upgrade requires extensive regression testing to ensure system stability.

4. Coordination overhead: Program offices must manage more contracts, vendors, and integration schedules.

This means that even well-designed modular systems will rarely outperform the best defense vendors with simpler architectures and strong trust relationships with their USG customers.

What I've Learned About USG Customers and Vendor Lock-In

Throughout my career, I've learned that USG customers who are measured by mission success focus most on two things: readiness and sufficient innovation to achieve mission success. When a defense vendor enables both, I've never heard vendor lock-in become a hot topic. In these cases, lock-in often reflects deep technical integration that actually accelerates capability delivery and reduces risk.

The opposite is also true. When vendors don't come through on needed capabilities in time for missions that were depending on them, when bugs materialize that hurt mission operations, when vendors miss mission deadlines, or when vendors meet deadlines by cutting corners leading to system crashes in the field, that's when frustration builds and the government's protective instincts activate.

The F-35 failed on both measures. Simulator delays and upgrade bottlenecks hurt readiness. The inability to bring in competitive subsystem innovations at speed held back capability growth. That failure set in motion a wave of acquisition reforms designed to prevent future overdependence on a single vendor.

But some vendors manage to avoid triggering these defensive responses entirely.

When Defense Vendors Deliver, Vendor Lock-In Fades into the Background

I've seen this pattern across multiple defense vendors of varying sizes: when they deliver mission success, customers tolerate high vendor lock-in. Anduril consistently receives praise for speed and capability. Palantir gets criticized for expensive pricing and cumbersome data integration, yet customers stay because they improve operational decision-making. The pattern holds: when vendors deliver mission value, customers accept the downsides.

Both companies have significant vendor lock-in, yet because they consistently deliver high mission value, lock-in is rarely discussed by their customers. When the body is healthy, the immune system stays dormant. When mission success is being delivered at speed and scale, the government has little reason to deploy its countermeasures.

The pattern becomes clear when examining customer satisfaction:

Table 2: Immune System Response to High-Performing Vendors

Mission First, Profits Second

Throughout my career, I've learned that defense vendors who put mission success at the center typically experience perpetual contract renewals. When vendors impede mission success instead, they create problems that program managers have to solve.

As a product and engineering leader, mission success was the air my teams breathed. Mission-focused vendors are rare, but program managers need vendors who are aligned with their mission success, not just meeting contractual terms. This focus usually pays off financially for the vendor in the long run because USG customers fall in love with such teams.

My advice to program managers: Find these mission-focused defense vendors and pay close attention to their culture. Beyond their words, watch whether their actions back it up. Do they prioritize getting capabilities to warfighters over protecting profit margins? Do they fix problems quickly or deflect blame? Do they deliver on schedule or always need extensions? Do they bring solutions or just problems? Their behavior under pressure reveals their true priorities.

The tradeoff isn't simple: MOSA and data rights aren't automatically good, and vendor lock-in isn't automatically bad. High-performing vendors with deep integration should always deliver capabilities faster than modular systems because they avoid the coordination overhead and integration risks. The key is recognizing when vendor lock-in accelerates mission success, and when it's time to let the immune system do its job.