Fractional CISO

Strategic cyber security leadership, governance, and a clear path forward.

Strategic cyber security leadership, built around your business

Cyber security is now one of the most significant operational and business risks facing organisations, yet it is still frequently misunderstood. For many organisations, it gets treated as a technical problem to be solved by the IT team, or a compliance box to be ticked before an audit. In reality, it is a business risk that needs to be owned at a senior level, shaped by strategy, and embedded into the way the organisation operates.

A Fractional Chief Information Security Officer (CISO) gives you that senior-level ownership, without the cost of a full-time hire.

What a Fractional CISO actually does

A Chief Information Security Officer is responsible for defining and leading an organisation’s approach to cyber security. That means understanding where the risks lie, establishing an appropriate security strategy, and ensuring the right governance, controls, and operational measures are in place as the organisation evolves.

Our Fractional CISO works closely with leadership teams to understand the organisation, its sector, regulatory pressures, and risk profile. We then assess the current security posture, define a clear and proportionate cyber security strategy, and develop a practical improvement roadmap that can realistically be delivered by the organisation and its partners.

Most importantly, we translate cyber security into clear business language so boards and senior stakeholders can make informed decisions with confidence.

Common signs your organisation needs a Fractional CISO

Cyber security leadership is not only for large enterprises. These are some of the situations where a Fractional CISO typically makes a significant difference:

  • Cyber security is being managed reactively, with no clear strategy or ownership at a senior level
  • The board is aware of cyber security as a risk but has no clear picture of where the organisation stands
  • A client, insurer, or regulator has asked questions your team cannot confidently answer
  • A system failure or security incident has made the absence of strategic oversight visible
  • A recent incident, near-miss, or security review has highlighted gaps that need more than a technical fix

Typical areas of Fractional CISO support include:

Every organisation's cyber security needs are different, shaped by its size, sector, risk profile, and where it is on its security journey. Our Fractional CISO engagement is structured around what your organisation actually needs, rather than a fixed scope of work. Typically, that covers:

Cyber security strategy and roadmap development

Defining a clear, proportionate security strategy and a practical plan for delivering it over time.

Board reporting, governance, and cyber risk oversight

Giving your leadership team the visibility and confidence to own cyber security as a business risk.

Security reviews, maturity assessments, & improvement planning

Understanding where you are today and building a realistic path to where you need to be.

Cyber Essentials, Cyber Essentials Plus, and ISO 27001 advisory support

Guiding you through certification pathways in a way that builds genuine security, not just compliance.

Incident response planning, readiness reviews, and tabletop exercises

Making sure the organisation knows what to do if something goes wrong, before it does.

Supplier, managed service provider, and third-party security assurance

Ensuring the organisations you rely on meet the standard you expect.

Security oversight of Microsoft 365, cloud, and hybrid working environments

Practical oversight of the platforms most organisations depend on day to day.

Business continuity, operational resilience, and disaster recovery alignment

Connecting cyber security to the broader question of how the organisation keeps running under pressure.

Cyber security support during mergers, acquisitions, and organisational change

Managing security risk through periods when it is most easily overlooked.

Why Sibrossa?

Our experience goes beyond technical cyber security consultancy. We have operated in senior technology and security leadership roles within complex and regulated organisations, including professional services environments where operational resilience, governance, client trust, and regulatory expectations are critical.

We believe cyber security should be pragmatic, proportionate, and aligned to the operational needs of the organisation. Done properly, it becomes more than a compliance exercise - it becomes part of how an organisation manages risk, protects its reputation, and builds confidence with clients, partners, insurers, and regulators.

Let's start a conversation

If you are not sure where your organisation stands on cyber security, or you know something needs to change but are not sure where to begin, the best first step is a conversation. Book a meeting with our team and we will make sure you leave with a clearer picture of where you are and what good could look like for your organisation.
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