What is a CISO?

It’s been a long time that cybersecurity was just a technical IT issue. Nowadays, it’s plain and simple; it’s a business risk. In many cases, it’s also a legal obligation. That’s where a Chief Information Security Officer (CISO) fits in.

In this post, we explain what a CISO is, what they’re responsible for, and why organisations are turning to external options like CISO as a Service.

1.  What Is a CISO? (Chief Information Security Officer)

A CISO is the person responsible for protecting your organisation’s information. They manage the cybersecurity strategy, oversee technical and organisational measures, ensure compliance, and coordinate responses when things go wrong.

Their role is part leadership, part oversight. They help understand where the organisation’s risks are and install the right policies, tools, and behaviours in place to reduce them.

2.  What are the key responsibilities of a CISO? 

While each organisation is different, most CISOs focus on the following areas:

• Security policy and governance
  Develops clear policies and sets direction.
• Risk management
  Identifies gaps, prioritises risks, and proposes mitigation plans.
• Compliance and reporting
  Ensures alignment with laws and frameworks like NIS2, ISO 27001, GDPR, and DORA.
• Incident response and continuity
  Coordinates the response when incidents happen and helps the business recover.
• Technical oversight
  Works with IT to ensure systems are secure and controls are effective.
• Awareness and training
  Builds a security culture across the organisation.

In short: a good CISO turns security into a structured part of how your organisation operates, not just something you think about after a breach.

3.  Why and when do organisations need a CISO? 

As stated before, cybersecurity is a management issue, with direct impact on operations, reputation, and legal obligations.

Here’s why organisations are appointing a CISO or outsourcing the role:

• Cyber risks are increasing
  Attacks are getting more sophisticated, and no sector is immune. From phishing to ransomware to supply chain compromise, the risks are growing, especially for organisations that rely on external vendors, cloud infrastructure, or remote access.
• Compliance is becoming stricter
  Regulations like NIS2, GDPR, and DORA raise the bar on security and accountability. To meet these requirements, organisations often need to implement structured frameworks, such as ISO 27001 or the CyberFundamentals Framework, that cover governance, incident response, supply chain controls, and reporting obligations. A centralised role like a CISO helps to coordinate these efforts and ensure alignment across teams.
• Clients and partners demand assurance
  Whether through audits, vendor questionnaires, or security clauses in contracts, external stakeholders increasingly expect proof (are require proof) that your information security is under control. A CISO can help you prepare and respond credibly.
• One incident can be enough
  A single data breach, system outage, or compliance failure can lead to legal penalties, reputational damage, and lost business. A CISO helps build prevention into your structure, and ensures you’re ready to respond if something does go wrong.
• Security needs structure
  Security requires a straightforward approach. A CISO helps define policies, assign responsibilities, and align security with your business priorities. That’s hard to achieve without clear leadership.

In short: Hiring a CISO helps move security from an ad-hoc effort to a managed, strategic function. And that’s essential in today’s environment.

4.  What Makes a Good CISO?

Not every technically skilled person is suited for the CISO role. A good CISO combines knowledge of security risks and clear understanding of how the organisation works with strong communication and leadership skills. Key traits include:

• Solid cybersecurity expertise
  A CISO should understand core areas like threat detection, cloud and network security, identity management, and compliance controls. Certifications such as ISO 27001 Lead Implementer or Auditor, CISSP, or CompTIA Security+ are useful indicators—but experience counts just as much.
• Strategic thinking
  Security should support the business, not obstruct it. A capable CISO can link security efforts to the organisation’s broader goals and risk appetite.
• Clear communication
  Technical risk doesn’t always speak for itself. A CISO needs to translate and explain technical issues clearly, to leadership, staff, partners, and sometimes regulators.
• Cross-functional leadership
  Cybersecurity cuts across departments. A strong CISO works with IT, HR, legal, operations, and finance to embed security into daily practice.
• Proven outcomes
  Look for someone who can demonstrate real impact: reduced risk, improved audit results, stronger compliance, and better incident response.

5.  What Is CISO as a Service (CISOaaS)?

Not every organisation needs a full-time CISO. But many still need the role.

CISO as a Service (CISOaaS) is a flexible model that gives you access to experienced security leadership, without the overhead of a permanent executive. This can be useful in several situations:

• Your organisation is in scope for regulations like NIS2 or DORA
• You’re working towards ISO 27001 or another certification
• You need interim support during transitions or leave
• You want a structured security approach but don’t have the capacity in-house
• You need board-level visibility on security risks, but not every day

With CISOaaS, you get strategic guidance, policy development, risk oversight, and audit preparation, all tailored to your size, sector, and needs. It’s a practical way to get the benefits of a CISO, without committing to a full-time hire.

6.  CISO vs. Outsourced CISO: Which One Is Right for You?

Here’s a quick comparison to help you decide:

• Full-Time CISO
• High salary + benefits
• Best for large enterprises
• Onsite leadership presence
• Longer recruitment process
• Long-term commitment
• CISOaaS

• Pay-as-you-go pricing
• Perfect for SMEs or startups
• Remote or hybrid flexibility
• Quick deployment and scalability
• Agile, adaptable model

For many companies, outsourcing a CISO offers a faster, smarter way to access top-tier expertise without the high overhead.