You’re a fast-growing tech or SaaS firm. You’ve won interest from government or defence agencies. The commercial terms look attractive. But then comes procurement, risk, legal and they ask for security leadership, oversight, compliance, and resilience.
Suddenly you face a question: Do I need to hire a full-time CISO? Or can I get in via a fractional CISO?
In this post, we’ll walk through:
- The defence and government security expectations you’ll face
- What a fractional CISO can do (and what it can’t)
- How you can bridge the gap
Security Requirements in Defence & Government Contracts
Before we talk about roles and functions, you need to know what’s expected of you as a supplier or potential partner.
The UK Cyber Security Model & Defence Standards
- The Cyber Security Model (CSM) is a supplier assurance framework used across MOD and defence contracts. Suppliers self-assess and must meet controls set in Defence Standard 05-138 aligned with their risk profile.
- For certain risk levels, suppliers may be required to submit a Cyber Implementation/Improvement Plan (CIP) if they cannot immediately meet all requirements.
- Contracting rules can embed cybersecurity obligations into contracts, meaning failure to maintain security posture can violate the contract.
- In wider public procurement, the UK government increasingly expects Cyber Essentials certification as a minimum bar for IT suppliers.
In short: government and defence procurement expect more than a promise. You’ll be measured against known frameworks, given long questionnaires, and asked to prove resilience, not just intention.
That’s why your customer asking “Who is your security lead?” is not a soft question. It’s a gatekeeper question.
The Role of a CISO…An Why It Matters
Government buyers expect:
- Accountability & Governance – this means a named individual responsible for risk, escalation, and incident decision-making.
- Board-Level Reporting – security framed into a business language for leadership and oversight.
- Contract Alignment – someone ensuring controls match obligations in contracts (and for sub-contractors as well).
- Continuity & Resilience – assurance that you can endure disruption, not just recover from it.
The problem?
Full-time CISOs are expensive, rare, and often overkill for SMEs and scaleups still proving their model.
Fractional CISO: The Smart Alternative
A fractional CISO (sometimes called fCISO) provides senior security leadership on a part-time or contract basis. They give you the credibility and governance you need to win trust in bids without the overhead of a permanent C-suite hire.
What a Fractional CISO Can Do:
- Act as your named security lead in proposals, contracts, and risk discussions
- Provide board-level dashboards and reporting packs for oversight
- Align your operations with Defence Standard 05-138, Cyber Essentials, ISO 27001, SOC 2, NIST CSF and other relevant frameworks
- Guide incident response planning, crisis simulations, and continuity design
- Prepare and respond to supplier assurance questionnaires
- Oversee vendor and subcontractor risk management
What They Won’t Do (Unless Scoped In)
- Run a 24/7 security operations centre, which can be overkill
- Replace specialist engineering roles, they serve as an addition to your existing team
- Magically fix compliance gaps without budget or buy-in
Done right, a fractional CISO gives you the credibility of a full-time hire at a fraction of the cost.
Why Muse Cyber’s Model Works
At Muse Cyber, we’ve helped fintechs, SaaS providers, and defence-adjacent suppliers cross the credibility barrier in weeks, not years.
- Fractional leadership: seasoned CISOs and cyber risk experts embedded into your team.
- Rapid 3-week assessment: benchmark your posture against government standards and highlight critical gaps.
- Strategic roadmap: targeted to what buyers and regulators actually ask for, not bloated frameworks.
- Board-ready reporting: dashboards, KPIs, and escalation paths aligned with governance best practice.
- Operational resilience: continuity design, disaster recovery, crisis simulations, and exec playbooks that prove you’re ready for disruption.
Case in point: A startup we support was able to satisfy board reporting, investor scrutiny, and enterprise procurement in under 90 days – without the need of a full-time CISO.
A Real-World Example: Meeting Defence Supplier Requirements
Imagine you’re bidding on a MOD contract under the Cyber Security Model. The procurement questionnaire demands:
- Evidence of compliance with Defence Standard 05-138
- Continuity and disaster recovery planning
- Named accountability and board oversight
- Controls extended to subcontractors
Without a security lead, your answers will sound piecemeal:
“We have some policies”
“We plan to build this”
That won’t cut it.
With a fractional CISO, you can show:
- A named expert responsible for risk
- A governance and reporting framework that satisfies oversight requirements
- A consolidated security programme mapping your controls, suppliers, and recovery plans
That difference alone can be enough to win credibility in competitive bids.
When to Bring in a Fractional CISO
You may not need one from day zero, but it’s time to consider it if:
- You’re preparing your first government or defence bid.
- Buyers are asking “Who owns security?” or requesting board-level reporting.
- You’re getting long supplier assurance questionnaires you can’t confidently answer.
- You need to align with FCA, PRA, DORA, or NIS2 requirements.
- You want credibility with investors, boards, and regulators without full-time overhead.
Your Next Steps
So, do you need a CISO to get into government?
You don’t always need a full-time hire from day one. But you almost always need credible, documented security leadership. A fractional CISO gives you governance, accountability, reporting, and resilience – without the cost and delay of a permanent hire.
