Holding Subcontractors Accountable for SCIF Containment Performance

On SCIF and SAPF projects, most RF and acoustic containment failures are not catastrophic- they’re small defects discovered at the worst possible time. Issues like seams, penetrations, grounding interfaces, and door assemblies often go unnoticed during construction, not because they’re complex, but because performance isn’t truly validated until accreditation testing.

By the time those tests occur, the enclosure is complete, finishes are in place, trades have demobilized, and access is limited. What should have been a straightforward correction becomes a disruptive and expensive reconstruction effort—turning a $10K issue into a $100K–$500K problem, driving schedule delays and shifting risk directly onto the GC or Prime.

The issue isn’t the severity of the defect—it’s when it’s discovered.

The Gap is that Containment Requirements Are Not Enforceable During Construction

Most projects rely on:

• Drawings and specifications

• Subcontractor self-performance

• Final testing as the first real validation

What’s missing:

• No measurable installation criteria tied to performance

• No verification checkpoints during construction

• No way to objectively hold subcontractors accountable

• No visibility into which trade owns a failure

Result:

• Containment becomes a shared responsibility with no ownership

• Issues surface only at the end—when correction is most expensive

• Accountability becomes dispute-driven instead of data-driven

If performance isn’t measured during construction, it can’t be enforced.

The Sentinel Approach

Make Containment Performance Measurable, Verifiable, and Enforceable by integrating verification into construction, giving GCs and Primes control over containment performance, not just visibility.

Phase 1 – Define Enforceable Requirements

• Translate CTTA / TEMPEST requirements into measurable subcontractor criteria

• Define clear ownership at every containment interface

• Identify high-risk scope gaps between trades

• Establish testable acceptance conditions

Phase 2 – Verify During Construction

• Perform RF and acoustic testing at key milestones

• Identify deficiencies while assemblies are still accessible

• Document performance tied to specific trade scope

Phase 3 – Targeted Remediation & Re-Verification

• Isolate root cause using diagnostic testing

• Implement targeted corrective actions (not broad rework)

• Verify that issues are fully resolved

Phase 4 – Certification & Documentation

• Conduct final RF and acoustic verification

• Deliver defensible, AO-ready documentation

• Provide a complete performance record of the enclosure

At the end of the day, this comes down to control.

When containment performance is only validated at the end of a project, cost, schedule, and risk all shift toward the GC or Prime. Small issues that should have been easy to fix become expensive problems, discovered after access is limited and trades are gone.

By moving verification into construction, you change that dynamic entirely.

Issues are identified while work is still accessible. Responsibility stays with the subcontractor performing the work. Corrections are targeted, not disruptive. And by the time you reach accreditation, you’re walking in with documented, verified performance—not uncertainty.

Containment failures don’t become expensive because they’re severe—they become expensive because of when they’re discovered.  Sentinel moves that discovery earlier—when problems are still easy to fix and accountability is clear.