Hire a Fractional CISO
Enterprise-Grade Security. Fractional Cost.
A fractional CISO owns your security posture one to three days a week: the risk picture, the controls, the policies, and the evidence enterprise buyers and auditors ask for. Fractionus matches you with vetted security leaders who have built programmes under real scrutiny.
A fractional CISO gives you senior ownership of security and risk one to three days a week, without the cost or commitment of a permanent hire. Fractionus connects you with vetted fractional CISOs who take ownership from day one, and who have already solved the problem in front of you at businesses like yours.
- Security posture and risk: A current picture of what could go wrong, ranked by what it would cost, rather than a list of tools.
- Compliance and evidence: The controls, policies, and artefacts frameworks expect, gathered as you go rather than assembled in a panic.
- Enterprise deal support: Security questionnaires, customer reviews, and the answers procurement and legal need before a contract is released.
- Flexible engagement: Brief us once, meet a vetted shortlist in days, and scale up or down as the business changes.
What is a fractional CISO?
A fractional CISO is a senior security leader who owns your information security programme on a part time basis, usually one to three days a week. The scope matches a full time Chief Information Security Officer: risk assessment, security architecture, policy, access and vendor management, incident response, and the assurance work customers and auditors ask for. The difference is cadence and cost, not accountability.
The role is also sold as a virtual CISO or vCISO, which describes the same arrangement under a different name. Be aware that some organisations use Chief Security Officer, also shortened to CSO, for a broader remit covering physical and personnel security as well as information security, and that the same acronym is used for Chief Strategy Officer, which is our fractional Chief Strategy Officer page. A CISO sits alongside a fractional CTO, who owns the technology you sell, and a fractional CIO, who owns the systems the business runs on.
What they focus on
- Risk assessment and a security roadmap ranked by business impact
- Security policy, standards, and the governance that keeps them current
- Readiness for frameworks such as SOC 2, ISO 27001, and the Essential Eight
- Identity, access, and third party or vendor risk management
- Incident response planning, tabletop exercises, and breach readiness
- Customer security questionnaires, assurance reviews, and audit liaison
When to hire a fractional CISO
Security usually arrives as a deadline somebody else has set.
- An enterprise deal has stalled on security review. The questionnaire is longer than the contract, procurement wants evidence rather than intent, and nobody internally owns the answers.
- You hold data that would be expensive to lose. Customer records, payment data, or health information, and the current controls live mostly in the heads of two engineers.
Fractional CISO, virtual CISO, or a security consultancy?
Three options get weighed here, and the right one depends on what is actually missing.
- A fractional CISO is an accountable leader inside your business, part time and ongoing. Choose this when security needs owning rather than assessing.
- A virtual CISO or vCISO is the same model under a different name, though it is sometimes packaged with a vendor's tooling. Judge it on the person and their independence, not the label.
- A security consultancy or penetration test delivers a report against a fixed scope and date. Choose this when you need an expert opinion or a point in time test, not standing ownership.
What a fractional CISO engagement looks like
Most companies start at 1-2 days per week with a heavier first month to complete a risk assessment and a gap analysis, then adjust once the rhythms hold. Common formats are retained days, sprint blocks, or outcome-based scopes, charged as a day rate or a monthly retainer. A part time CISO engagement is structured exactly the same way.
Current fractional CISO day rates are set out in our fractional executive rates guide.
90-day deliverables typically include
- A risk register ranked by business impact, with named owners and dates
- A security roadmap sequenced against the deals and obligations actually driving it
- A policy set that matches how the business genuinely operates
- A gap analysis against your target framework, with the evidence plan to close it
- An incident response plan that has been rehearsed at least once
- A reusable answer library for customer security questionnaires
Hire a Fractional CISO
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Why fractional CISO demand is rising
Companies are buying senior leadership the way they buy other infrastructure: at the level they need, when they need it. Fractional CISO arrangements let you try senior talent before committing to a permanent hire, and bring pattern recognition from leaders who have solved the same problems across several businesses. Security is the clearest case of a function needed at senior level long before it is needed every day: the judgement is required from the first enterprise deal, the workload usually is not. Industry reporting and platform data show sharp growth in fractional executive roles since 2022. Our fractional executive cost guide breaks down what the shift means for budgets.
How Fractionus places fractional CISOs
- Brief us once. Your stage, situation, team, and what has to be true in 90 days.
- Shortlist in days. Meet 2-3 vetted fractional CISOs matched to your situation.
- You choose. Interview, check fit, and select your leader.
- We handle everything else. Contracts, billing, onboarding, and smooth scale-up or scale-down.
What your fractional CISO will deliver, and how to measure it
- Time to complete a customer security questionnaire, and how many stall in review
- Open high and critical risks, and how long they stay open
- Progress against the control set for your target framework, measured as evidence collected
- Vulnerability and patch remediation time
- Access review coverage, and how quickly leavers actually lose access
- Incident response readiness, tested rather than documented
Fractional leaders from top brands
Frequently Asked Questions
Where can I hire a fractional CISO?
Fractionus places fractional CISOs directly. You brief us once on your stage, your situation, and what has to be true in ninety days, and we come back with a shortlist of two or three vetted security leaders matched to that brief, usually within days.
The alternatives are your own network, executive search firms, and general freelance marketplaces. A network introduction is free and fast when it works, but the sample is small and rarely matched to your stage. Search firms are built for permanent placements and priced for them. Marketplaces carry volume without vetting at this level, which moves the filtering work back onto you. Security is a poor category to filter yourself, because credentials are hard to read from the outside and the consequences of a weak hire surface late.
What is the best platform for hiring a fractional CISO?
Judge a platform on three things: whether it vets people before it introduces them, whether it understands the difference between a CISO and the roles either side of it, and whether it handles contracting, billing, and scale-down without you managing any of it.
Fractionus is built for exactly that. Every leader is vetted before they reach a shortlist, matching is done against your situation rather than keyword overlap, and the commercial side runs through us so the engagement can flex as the business changes. It also means we will say when a short assessment or an auditor is the better buy than a standing CISO.
How much does a fractional CISO cost?
Fractional CISOs are engaged by the day or on a monthly retainer, so cost scales with seniority and days per week rather than a salary band plus benefits, equity, and recruitment fees. Most engagements run one to three days a week, with a heavier first month while the picture is being built. Certification pushes usually need more days for a period, then drop back to a maintenance cadence once the evidence is running itself.
Current day rates by role are set out in our fractional executive rates guide. The comparison worth making is not against a permanent salary in isolation, but against the cost of the problem staying unsolved, and against the cost of a full time hire who turns out to be the wrong one.
How do I start a search for a fractional CISO?
Start with the outcome rather than the title. Write down what has to be true in ninety days, what is breaking now, who the person would work with, and how many days a week you can genuinely give them. Bring the security questionnaire that stalled your last deal. It is the fastest way to scope what the role actually has to fix first.
Then brief us once. We will tell you straight if the answer is a different level, a different role, or that the problem is better solved without a hire at all. If a fractional CISO is the right call, you will meet a matched shortlist in days rather than weeks.
What should I look for when hiring a fractional CISO?
Look for someone who has carried accountability rather than only advised on it: a programme they owned end to end, a certification they took a company through, an incident they ran, and an enterprise review they got past. Ask how they decided what not to fix, because a CISO who treats every risk as critical will spend your budget and stall your roadmap.
Beyond the specifics, look for someone who has operated at your stage rather than only at a much larger one, who is comfortable being accountable for outcomes on limited days, and who is willing to tell you when you are wrong. Fractional leadership only works when the person has enough standing to be listened to and enough independence to disagree.
How do I vet a fractional CISO before hiring?
Ask for two or three situations that resemble yours and go deep on one of them: what they inherited, what they changed first, what they deliberately chose not to do, and what the numbers looked like when they left. Answers that stay vague at that depth are the clearest signal you will get. For a CISO, ask them to talk you through an incident they handled badly and what changed afterwards.
Then take references from people who reported to them, not only from the person who hired them, and consider a short paid piece of scoped work before a large engagement. Every Fractionus leader is vetted before they reach your shortlist, but the judgement on fit stays yours.
What is the difference between a fractional CISO and a fractional CTO?
A CISO owns security, risk, and assurance: what could go wrong, what controls exist, and what evidence customers and auditors are shown. A fractional CTO owns the technology the business sells, including architecture, engineering team, and delivery. The two overlap constantly and are not substitutes.
If security is blocking deals or exposing you to loss, the CISO is the hire. If technical direction and the engineering team are the constraint, it is the CTO. Smaller companies often start with a CTO and add a fractional CISO the moment enterprise buyers appear. Part time, outsourced, virtual, and contract CISO arrangements all describe the same fractional model. Our fractional engineering and technology hub compares the leadership levels side by side.
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