Blog · Field Notes From the Boundary

CMMC, decoded by people who passed it.

Practitioner articles on CMMC Level 2, NIST SP 800-171, SPRS scoring, GCC High, and the Microsoft security stack, written by a team that holds the certification it helps clients earn.

Latest articles

SPRS & Scoring

Your SPRS Score, Explained: Why It Runs From −203 to 110

How 110 controls become one number, why most first scores are negative, and which gaps to close first.

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CUI Fundamentals

What Actually Counts as CUI? (And What Doesn't.)

How FCI, CUI Basic, and CUI Specified differ, and how overmarking inflates your boundary and your budget.

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Microsoft 365

GCC High vs. Commercial M365: Who Actually Needs to Migrate

Why your contracts drive the decision, how ITAR data triggers it, and the enclave alternative that migrates fewer seats.

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Budget & Planning

What CMMC Level 2 Really Costs, and Where the Money Goes

The cost stack from discovery to assessment, and why scope moves the total more than tooling does.

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Documentation

No SSP, No Score: The Document Everything Depends On

Why 3.12.4 carries no point value, what a real System Security Plan contains, and how assessors test it.

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Assessment Rules

POA&Ms Under CMMC: What Can Stay Open at Assessment

The 88-point floor, the short list of gaps that may stay open, and the 180-day closeout that replaced the old open-ended plan.

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Assessment Prep

Inside a C3PAO Assessment: What Assessors Actually Test

How assessors work through 320 objectives with three evidence methods, starting from your SSP.

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Choosing a Partner

Choosing an MSP for CMMC: The Shared-Responsibility Questions That Matter

Your MSP is inside your assessment whether they like it or not. These are the questions to ask before you sign.

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Microsoft Security Stack

Mapping the Microsoft Security Stack to NIST SP 800-171

What Entra, Intune, Defender, Sentinel, and Purview each cover in 800-171, and what no license buys you.

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Incident Response

The 72-Hour Clock: DFARS Incident Reporting Nobody Practices

Sort out the medium assurance certificate, DIBNet access, and 90-day preservation before an incident starts the clock.

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From the archive

Long-form guides