Over the past year, much of the discussion around the Department of Defense’s Cybersecurity Maturity Model Certification (CMMC) program has focused on compliance requirements, technical controls, and audit readiness. But there is another issue beginning to emerge beneath the surface: supply chain resilience.

Many organizations in the Defense Industrial Base (DIB), particularly small and mid-sized subcontractors, are beginning to ask a difficult question:

“Is continuing defense work worth the compliance burden?”

That question matters because the DIB is not made up primarily of large prime contractors. It is built on thousands of machine shops, component manufacturers, software firms, engineering companies, and specialized suppliers that support the defense ecosystem indirectly as subcontractors.

As CMMC requirements increasingly flow through contracts and supply chains, these organizations are facing new realities:

• multi-factor authentication implementation
• endpoint monitoring
• secure enclave requirements
• policy and documentation development
• vulnerability management
• third-party assessments
• ongoing evidence collection and governance

For some companies, especially those with mature IT environments, these are manageable operational improvements. For others, particularly small manufacturers with thin margins and aging infrastructure, the costs can feel disproportionate to the defense revenue they generate.

This has led to growing concern among larger defense primes regarding supplier attrition.

Companies such as RTX, Honeywell, and other major defense contractors depend on extensive subcontractor ecosystems. If enough lower-tier suppliers decide to exit defense contracting rather than pursue CMMC readiness, the result could become a genuine supply chain challenge.

At the same time, it is important to separate market reality from oversimplified talking points.

For example, there is increasing discussion around the relationship between the Joint Certification Program (JCP) and CMMC. Some commentary implies that all JCP participants will automatically require CMMC Level 2 certification. That is not technically accurate.

JCP itself is not a cybersecurity certification regime, nor does it directly “force” CMMC certification. However, organizations participating in defense technical-data ecosystems through mechanisms like JCP are increasingly likely to encounter DFARS, NIST 800-171, and eventually CMMC obligations depending on the contracts, controlled technical data, and CUI involved.

That distinction matters.

The defense compliance environment is evolving quickly, and precision is important — especially for companies trying to determine whether they are truly in scope for Level 2 requirements.

What we are seeing today is not simply “compliance resistance.” In many cases, companies are making rational business calculations:

• How much defense revenue do we actually generate?
• Do we handle Controlled Unclassified Information (CUI)?
• Can we support ongoing cybersecurity governance?
• Does remaining in the DIB still make strategic sense?

Over the next two to three years, these questions will likely become more common as CMMC requirements continue appearing in solicitations and contract renewals.

For organizations intending to remain in the defense ecosystem, the best strategy is not panic — it is preparation. Companies that begin methodically improving cybersecurity maturity now will be in a far stronger position than those waiting until contract pressure becomes immediate.

The organizations that approach CMMC as a long-term operational capability rather than a one-time audit exercise are likely to navigate the transition most successfully.