Consulting and Implementation Support for Defense Contractors
Domain 3 - Consulting and Implementation Support for Defense Contractors
This domain tests how an RP supports an organization seeking certification (OSC) without crossing into assessment. You advise, scope, build, and prepare; you do not certify, attest, or affirm for the client.
What an RP may and may not do
Permitted: scoping, gap analysis against the model, SSP and POA&M drafting support, policy and procedure development, technical remediation guidance, evidence mapping, tabletop or mock assessments, and assessment-day logistics. Prohibited: conducting a CMMC assessment, issuing a certificate or "pass" opinion, sitting on the C3PAO team for a client you advised, or affirming compliance on the client's behalf. The OSC's senior official owns the affirmation.
A practical delivery sequence
- Scope: inventory CUI, identify CUI assets, security protection assets, and any contractor risk managed or specialized assets; draw the boundary.
- Gap assessment: map each of the 110 requirements to its objectives and record evidence and deficiencies.
- Remediate: sequence by risk and by POA&M eligibility - fix non-deferrable requirements first.
- Document: SSP, network diagram, POA&M, CUI inventory, policies, and inherited-control documentation for cloud services.
- Rehearse: run interviews and demonstrations the way an assessor would, and close gaps that only appear in practice.
Scoping is the highest-leverage decision
Segmentation (a CUI enclave) can shrink scope, but only if it is real. If the enclave authenticates to corporate Active Directory, those domain controllers are security protection assets in scope. Shared logging, backup, and virtualization platforms follow the same logic.
Worked example
A client proposes moving all CUI to a SaaS platform and declaring its internal network out of scope. The RP should confirm: does the CSP meet applicable requirements, and can the client document which controls are inherited versus implemented? If the CSP environment is not acceptable or inheritance is undocumented, CUI still touches the client's endpoints, identity, and administration paths - those assets stay in scope.
Traps
- Promising certification or "guaranteeing a pass."
- Writing an SSP the client cannot explain or defend in interviews.
- Under-scoping by ignoring identity, logging, backup, and hypervisor layers.
- Fabricating or "cleaning up" evidence; that is an ethics violation, not a consulting style choice.