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CISO as a Service is the deployment of an experienced Chief Information Security Officer on demand, for a fixed number of days per month or for a defined programme. The model suits organisations that have to govern cyber risk at board level, but do not yet need a full-time CISO. The role brings direction to security strategy, risk analysis, governance, supplier risk and reporting to executive management and the board.
The choice is driven by responsibility, not by size. The Dutch Cybersecurity Act has been in force since 15 August 2026 and places ultimate accountability for cyber risk management with the board. That creates a need for senior security direction, including in organisations where a permanent C-level role is not yet realistic.
Cybersecurity is no longer a purely technical question. Digital resilience touches continuity, customer trust, legislation, liability and board decision-making directly. The question is therefore not only whether systems are technically secure, but also who sets direction, sets priorities and informs the board.
A CISO brings oversight, structure and direction to information security. The role connects technology, risk, compliance and governance. A CISO therefore looks beyond firewalls, penetration tests or incidents, and focuses on whether security is demonstrably governed.
A capable CISO supports security strategy, risk analyses, policy, governance, supplier risk, audits, incident preparation and reporting to executive management and the board. The value lies mainly in coherence. Many organisations have taken individual measures, but lack direction.
A penetration test has been carried out, monitoring is running, policy documents exist and IT is working hard on improvements. What is sometimes missing is the central question of which risks weigh most heavily for this organisation. That question includes who decides, and how the organisation demonstrates that controls work.
The Dutch Cybersecurity Act, the national implementation of NIS2, increases board level responsibility for cyber risk management. Organisations in scope face obligations covering registration, duty of care, incident reporting, risk management, governance and supervision. The board remains ultimately accountable, has to approve measures and oversees their implementation.
That calls for more than technical delivery. It calls for substantiated choices, current risk information and clear reporting to executive management and the board. For large organisations, a permanent Chief Information Security Officer is often the logical answer.
For mid-sized organisations, growing companies and complex IT or OT environments the picture differs. The responsibility exists, but the need for a full-time CISO is not always structural. IT can execute a great deal, yet is rarely set up to carry governance, compliance, threat intelligence, supplier risk, audit questions and security strategy at the same time.
A CISO on demand is most valuable when the security question is too important to handle on the side. At the same time, that question is not yet large enough for a permanent C-level position. This applies, for example, when an organisation falls under the Dutch Cybersecurity Act or expects to fall under it.
The obligations require demonstrable risk management, board involvement and structural follow-up. Temporary or structural CISO capacity can also fit around ISO 27001, DORA, the GDPR, customer questions or cyber insurance. Auditors, customers and supervisors increasingly ask for evidence in the form of policy, risk analyses, controls, reporting, incident processes and improvement plans.
CISO as a Service also suits organisations that are growing quickly, merging, digitalising or becoming more dependent on cloud, SaaS, OT, suppliers and international supply chains. In such situations the risk profile changes faster than the internal organisation can follow. An external CISO then brings experience, structure and pace.
DeepBlue Security & Intelligence supports organisations with senior cybersecurity expertise at strategic, tactical and technical level. The strength lies in combining board level interpretation with technical depth. Advice therefore does not stay on paper, because DeepBlue knows what vulnerabilities, attack paths, incidents and operational dependencies mean in practice.
As with its security specialists, DeepBlue staffs CISO as a Service exclusively with senior professionals. These CISOs have extensive experience with complex security questions, board decision-making, compliance, incident preparation and technical risk. They engage directly with the board, executive management, IT, compliance and external parties.
Depending on the situation, an engagement starts with a baseline assessment, a risk analysis or a maturity review. Prioritisation, governance design, preparation of board reporting and guidance of improvement measures follow from there. An external CISO does not take over the responsibility of the board, but makes sure the board, executive management, IT, compliance and suppliers work from the same risk information.
The main benefit is access to senior expertise without committing to a full-time appointment. Organisations gain strategic security leadership at the moment it is needed, matched to size, risk and maturity. The second benefit is independence, because an external CISO can assess existing choices, suppliers, controls and priorities objectively.
That independence matters when security decisions carry board level impact. It matters equally when commercial suppliers mainly recommend their own solution. The third benefit is speed, because recruiting an experienced CISO takes time while compliance questions, customer requests, audits and incident risk do not wait.
The fourth benefit is scalability. One day per month is sometimes enough for reporting, prioritisation and board consultation. In other periods more capacity is needed, for example around an audit, an incident, a merger, a penetration testing programme or a NIS2 project.
A CISO on demand should not only produce policy. The value appears when risks are translated into demonstrable controls. That means plans are connected to technical validation, penetration testing, logging, incident preparation, supplier assessments and concrete improvement actions.
For organisations with complex IT and OT environments that connection is essential. Board members need to be able to rely on clear risk information. Technical teams need concrete priorities at the same time.
A capable CISO brings those two worlds together. Policy without technical validation remains an assumption. Validation without board level translation rarely leads to a decision.
CISO as a Service suits organisations that have to govern cyber risk seriously, but do not yet need a full-time CISO. The role offers senior direction, board level interpretation and practical progress at the point where pressure from legislation, customers, auditors or threats increases. For DeepBlue Security & Intelligence, a CISO on demand is about demonstrable resilience rather than general security advice.
The main limitation is that an external CISO does not take over the ultimate accountability of the board. That accountability is set in law and stays inside the organisation.
A CISO on demand works best when board level direction and technical validation reinforce each other. Which services fit depends on the sector, the size of the organisation and the measures already in place.
If the scope of the legislation still has to be established, the basics are set out in The Dutch Cybersecurity Act: 15 August 2026, covering scope, the core obligations and the formal documentation per ministry.
Cyberbeveiligingswet, Bulletin of Acts 2026, 187 | NCTV, Cyberbeveiligingswet legislation and regulations | NCSC, Cbw and Wwke in force from 15 August 2026 | Directive (EU) 2022/2555, NIS2 | Regulation (EU) 2022/2554, DORA | ISO/IEC 27001, Information security management systems
Last reviewed: 20 August 2026.
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