Can a managed service provider help with CMMC?
Yes. A managed service provider can implement and operate many of the 110 NIST SP 800-171 controls for you, from multifactor authentication to logging and patching. Under the CMMC rule, though, an MSP that handles your CUI or security data is part of your assessment scope, and your company, not the MSP, owns the SSP, the SPRS score and the senior-official affirmation.
What an MSP can take off your plate
- Identity and access: multifactor authentication, account lifecycle, privileged access.
- Endpoint and server management: patching, configuration baselines, encryption.
- Logging and monitoring: centralized audit logs, alert review, incident response support.
- Cloud administration, including Microsoft 365 GCC High.
- Backup protection, vulnerability scanning and evidence collection.
How the CMMC rule treats your MSP
32 CFR Part 170 calls outside IT and security firms External Service Providers. If an ESP that is not a cloud provider processes, stores or transmits your CUI, or Security Protection Data such as logs and configuration data, the services it provides are in your assessment scope and are assessed as part of your assessment.
In practice that means the MSP's tools, remote access methods and staff practices have to meet the same requirements as your own, and your SSP must describe who does what.
If the provider is a cloud service that holds CUI, a different test applies: it must meet FedRAMP Moderate or equivalent requirements under DFARS 252.204-7012, and its customer responsibility matrix goes into your SSP.
What stays with you
Your company signs the affirmation and posts the score in SPRS. You decide what is CUI, which employees handle it, and which risks you accept. Policies, training completion and physical security of your facilities are yours. An MSP can draft documents and operate controls, but a senior official at your company remains accountable for the result.
How to choose one
- Ask for a written customer responsibility matrix mapping each of the 110 requirements to you, the MSP or shared.
- Confirm how its remote management and security tools meet NIST SP 800-171, since they sit inside your scope.
- Check whether it has run a CMMC or 800-171 program before and who leads it.
- Make sure it can support 72-hour incident reporting under DFARS 252.204-7012.
Why it matters now
With the Phase 2 suspension, new DoD solicitations rely on Level 2 self-assessments affirmed by your own senior official. An MSP that runs the controls and keeps evidence current makes that affirmation defensible, and it positions you for third-party certification if DoD reinstates it after its review.
Common follow-up questions
Does my MSP need its own CMMC certification?
The rule's scoping table says a non-cloud ESP's services that touch your CUI or security data are assessed as part of your assessment. Ask whether the MSP has assessed its own environment so its practices hold up when your assessor reviews them.
Can an MSP do my self-assessment for me?
It can prepare evidence and scoring, but the SPRS submission and annual affirmation belong to your company, and a senior official must attest the results are accurate. Choose a provider that documents its work clearly enough for that official to stand behind.
Is an MSP different from a CMMC consultant?
Often. A consultant assesses, writes the SSP and plans remediation; an MSP runs the controls day to day. Some firms do both, which keeps documentation aligned with how systems are actually operated.
LAN Service Group combines managed IT for small and mid-size businesses with an ISSO-led CMMC practice, so the same team that runs your controls also maintains the SSP, POA&M and assessment evidence.
Talk to LAN Service Group (888) 281-7243