Virtual CISO for Defense Contractors
Plenty of defense contractors have an IT lead, a compliance spreadsheet, and nobody who owns security as a full job. A virtual CISO fills that seat without a full-time executive hire. Here is what one does, what the role has to do with CMMC, what it costs, and how to pick a good one.
Quick Answer
A virtual CISO is an outside security executive who leads your security program part time. For a defense contractor, that means owning risk decisions, the System Security Plan, the POA&M, incident planning, and the preparation for your annual CMMC affirmation. CMMC does not require you to hire a CISO. It requires a senior official who affirms compliance every year, and a vCISO is one way to give that person the facts to do it honestly.
What a Virtual CISO Does
A virtual CISO, also called a vCISO, works for you part time and usually remotely. The job is leadership, not engineering. A vCISO decides what your risks are, sets priorities, writes and owns the policies, and reports to your executives. The people who configure firewalls and manage accounts are still your IT team or your managed provider.
TechTarget describes the role as the same set of responsibilities a traditional CISO has, delivered part time. It puts onboarding at one to four weeks, compared with six to nine months to recruit and seat a full-time CISO. For a company that needs a security lead now, that gap matters.
| Term | What it usually means |
|---|---|
| vCISO | An outside executive who works part time and often serves several clients. |
| Fractional CISO | An outside executive who commits a set number of hours each week and works closer to an embedded team member. |
| CISO as a service | A vCISO delivered by a firm, with a team behind one lead person. |
| Full-time CISO | An employee who owns security for one company. |
Providers use these labels loosely. Ask for hours and deliverables in writing and do not rely on the title.
Does CMMC Require a CISO
No. Neither CMMC nor NIST SP 800-171 asks you to appoint someone with that title. What the rule does require is an Affirming Official. Under 32 CFR 170.22, that is the senior level representative in your company who is accountable for CMMC compliance and has the authority to attest to it.
The affirmation goes into SPRS after each assessment and every year after that. It names the person and states that your company has implemented, and will keep implementing, the applicable requirements for the systems in scope.
This is where a vCISO earns the fee. The person who signs is often an owner or an executive, not a security specialist. They need someone who can tell them, with evidence, whether the statement is true.
Where a vCISO Fits in NIST SP 800-171
A good vCISO owns the work that connects your controls to your paperwork. Here is how that work lines up with the requirements in NIST SP 800-171 Revision 2, the version CMMC uses today.
| Work | Requirement | What the vCISO does |
|---|---|---|
| Risk assessment | 3.11.1 | Runs the periodic risk assessment and decides what gets fixed first. |
| System Security Plan | 3.12.4 | Owns the plan, keeps the boundary accurate, and names a control owner for each requirement. |
| POA&M | 3.12.2 | Tracks open items and pushes them to closure inside the CMMC limits. |
| Control assessment | 3.12.1 and 3.12.3 | Checks controls on a schedule and watches for drift between assessments. |
| Incident handling | 3.6.1 | Writes the plan, runs the tabletop, and leads the response when something happens. |
| Security awareness | 3.2.1 | Sets the training content and tracks who has completed it. |
Our guide to the System Security Plan shows what the plan has to say, and our post on SSP, POA&M, and SPRS explains how the three documents connect. Before each affirmation, the vCISO reviews the evidence and the SPRS score so the signer is not guessing.
Signs You Need One
- Nobody on staff owns security as a primary job.
- Your IT person is also the compliance person, and compliance keeps losing to tickets.
- Your SSP has not been updated since it was first written.
- A prime has asked for your CMMC status and you cannot answer with confidence.
- You are weighing GCC High, an enclave, or a new MSP and have nobody to judge the tradeoffs. Our post on enterprise versus enclave covers one of those decisions.
- Your leadership signs the affirmation without knowing what stands behind it.
A virtual CISO is not right for every company. TechTarget says a traditional CISO is the better choice for large or high-risk environments with a big security team and complex internal infrastructure.
What a Virtual CISO Costs
Prices vary a lot, and most published numbers come from vendors with no source behind them. TechTarget lists monthly retainers from $5,000 to $20,000 and annual retainers from $30,000 to $120,000. It describes a traditional CISO as costing more than $250,000 a year plus benefits, and it does not cite a source for any of these figures. Use them as a rough frame and not as a quote.
Several things move the price.
- Hours per month, which PurpleSec puts at about 20 for a typical vCISO.
- The size and complexity of your environment.
- How much hands-on documentation work is included.
- Whether the vCISO is the named contact for assessors and primes.
- How much CUI and CMMC experience the vCISO brings.
The price is only half of the comparison. A gap you find yourself can be fixed on your schedule. A gap an assessor finds sets the schedule for you.
How to Choose a Virtual CISO
- Ask for defense experience by nameFind out whether they have worked through CMMC Level 2 assessments, SSPs, POA&Ms, and SPRS. A generic vCISO will spend your first months learning the rules.
- Get hours and deliverables in writingThe contract should list monthly hours, named deliverables such as the risk assessment, SSP updates, POA&M review, and a tabletop exercise, and a reporting schedule.
- Ask how they will reach your CUI environmentA vCISO who logs in to systems that hold CUI is part of your security picture. Ask how access is granted, logged, and removed.
- Find out who does the workSome firms sell one senior name and hand the work to junior staff. Ask who writes the documents and who answers your calls.
- Decide who speaks to assessors and primesSettle this before an assessment, not during one.
- Plan the exitPolicies, templates, and records should belong to you if the contract ends.
Sentinel Blue is also a C3PAO. We keep the two services separate, so a client that uses us for one does not use us for the other.
Common Mistakes
- Buying hours with no deliverables attached.
- Treating the vCISO as extra IT hands.
- Hiring a vCISO but leaving the Affirming Official out of the loop.
- Choosing a generalist with no defense background.
- Letting the vCISO write the SSP without involving the people who run the controls.
A note on timing. In July 2026 the Department announced it was suspending the CMMC Phase II rollout. Phase I self-assessment requirements remain in place, and the DFARS 252.204-7012 obligations still apply. Self-assessments and select government-led assessments continue to enforce the Revision 2 requirements. See the Department announcement of July 13, 2026, 32 CFR Part 170, and DFARS 252.204-7025. Primes still ask about status, so the program work does not wait. Our CMMC readiness assessment is a common first step.
Virtual CISO ServicesSee how Sentinel Blue provides security leadership for defense contractors.
Frequently Asked Questions
What is a virtual CISO?
What is the difference between a vCISO and a fractional CISO?
Does CMMC require a CISO?
How much does a virtual CISO cost?
Can a virtual CISO get my company CMMC certified?
How many hours a month does a vCISO work?
Do I need a vCISO if I already have an MSP?
Need a security lead without a full-time hire?
Sentinel Blue provides virtual CISO leadership for defense contractors working toward CMMC.
