By Brandon Hancock, J.D., CMMC-RP
GAO's March 5, 2026 report on cybersecurity-regulation harmonization gives contractors a useful vocabulary for a familiar problem: overlapping rules can consume time and money without always improving security. The answer is not to ignore requirements. The answer is to build a control-centered compliance program that can satisfy multiple regimes with one evidence base.
Harmonization is not a buzzword for contractors
Government contractors often face cybersecurity requirements from multiple directions. A defense contract may include DFARS 252.204-7012 and CMMC. A civilian contract may require agency-specific CUI controls. A cloud service may require FedRAMP. A critical-infrastructure customer may have sector rules. A state contract may add privacy or incident-reporting duties. A subcontract may add faster notice obligations than the prime contract.
GAO's report focuses on broader industry perspectives, but the contractor lesson is direct: inconsistent definitions, reporting triggers, timelines, and evidence expectations create operational friction. Small businesses feel that friction most sharply because they have fewer compliance staff and less room to duplicate work.
The problem is not “too much cybersecurity”
Contractors should be careful when talking about compliance burden. Agencies are not wrong to protect federal information and mission systems. The issue is whether overlapping regimes produce duplicative paperwork instead of better risk reduction.
A contractor may spend hours reformatting the same control evidence for different customers. It may have to maintain multiple incident-reporting matrices with slightly different definitions. It may build separate security plans for systems that share the same controls. It may answer the same due-diligence questions under different labels.
That work can be necessary, but it should be managed deliberately. Otherwise, compliance activity can pull attention away from patching, monitoring, access review, backup testing, and incident preparation.
What this means for government contractors
Contractors should not wait for federal harmonization to solve the problem. The practical solution is internal harmonization. Build a single control library that maps each security practice to the requirements it supports. For example, multifactor authentication may support FAR basic safeguarding, NIST SP 800-171 access control, agency zero trust expectations, insurance requirements, and customer questionnaires. The evidence should be collected once and mapped many times.
The same approach applies to incident reporting. Contractors should maintain one decision tree that maps different triggers and deadlines, rather than treating each contract as an isolated emergency plan.
This is also a proposal advantage. A contractor that can explain its control library, evidence refresh cycle, and requirement mappings will sound more mature than a contractor that says only “we are compliant.”
Harmonization should include subcontractors
Prime contractors have their own version of the harmonization problem. They must flow down requirements without overwhelming subcontractors or creating contradictions. A prime that sends five separate cybersecurity questionnaires to the same subcontractor may get worse information than one well-designed requirement matrix.
Subcontractors should ask primes for clarity: which requirements apply, which are mandatory flowdowns, which are customer preferences, what evidence is required, and what incident-notice path controls?
Next step: build a control-to-requirement crosswalk
Start with the controls you actually operate. For each control, map:
- the requirement sources it supports;
- the systems in scope;
- the evidence owner;
- the artifact location;
- the refresh cadence;
- the customer-facing proof point; and
- any gaps or exceptions.
Then use the crosswalk to answer questionnaires, update system security plans, prepare proposals, and support audits. Harmonization may be a federal policy goal, but contractors can begin by harmonizing their own evidence.
Sources
- Cybersecurity Regulations: Additional Industry Perspectives on the Impact, Progress, Challenges, and Opportunities of Harmonization, GAO-26-108685, U.S. Government Accountability Office, March 5, 2026.
- GAO-26-108685 PDF, U.S. Government Accountability Office, March 5, 2026.