With CMMC Phase 2 third-party certification paused for a 60-day DOW review, defense contractors still face mandatory Phase 1 self-assessments and rising False Claims Act exposure. This guide breaks down what hasn't changed — NIST SP 800-171 controls, FedRAMP requirements for compliance tooling, and SPRS accountability — and gives security leaders a phase-by-phase checklist to build a defensible, audit-ready compliance program regardless of how the review concludes.