CISO as a Service: Information Security Leadership Without Full-Time Employment

CISO as a Service refers to the mandate-based provision of a Chief Information Security Officer function by an external service provider. The model is not a stopgap for companies that cannot afford an internal CISO — it is a structured response to the shortage of skilled professionals in information security and the increased regulatory requirements from NIS-2 and ISO/IEC 27001:2022.

This article describes what a CISO-as-a-Service mandate covers, which company profiles it suits, what to consider in contractual design, and how the model works in the CIVAC ecosystem.

IT security consulting delivers project services: penetration testing, gap assessment, policy creation. It ends with a report and an invoice. CISO as a Service is structurally different: the external CISO takes on an ongoing leadership function with a reporting line to management, formal appointment, and responsibility for the ISMS.

The difference is legally relevant: Section 30 BSIG requires a designated person, not a commissioned firm. The appointment must be personal, and the appointment certificate must contain the name of the natural person. A framework contract with a consulting firm without a named individual does not fulfil this requirement.

In the CIVAC model, the officer is appointed by name: appointment certificate, signed, filed, verifiable. The platform documents all work results of the appointed CISO with a timestamp. More on the legal basis at Information Security Officer at CIVAC.

CISO as a Service is particularly suited to four company profiles. First: SMEs and mid-market companies (50 to 1,000 employees) that must fulfil NIS-2 or ISO/IEC 27001:2022 but have not budgeted a full-time CISO position. Second: companies in the growth phase that want to professionalise their ISMS before building an internal position.

Third: companies with an internal IT leadership that is operationally strong but wants to delegate strategic ISMS leadership and regulatory expertise. The CISO-as-a-Service mandate complements internal IT rather than replacing it. Fourth: corporate groups that want to provide a uniform CISO function for multiple subsidiaries without creating a separate position for each.

The model is not suitable for companies that need a fully operational IT security leadership including daily operations, firewall management, and 24/7 SOC coordination. That exceeds the typical CISO-as-a-Service scope.

A standardised CISO-as-a-Service mandate typically covers the following service blocks. Strategic: ISMS governance and development, risk analysis and treatment per ISO/IEC 27001:2022 Clause 6.1, security strategy and annual planning. Regulatory: NIS-2 compliance per Sections 30, 38 BSIG, incident reporting coordination (24h/72h), BSI registration and communication.

Operationally coordinating: training programme management per ISO/IEC 27001:2022 Control 6.3, supplier assessment (A.5.19 to A.5.22), internal audit coordination, incident management activation. Reporting line: quarterly status reports to management, board presentations, management review per ISO/IEC 27001:2022 Clause 9.3.

Not included in the standard mandate: daily IT administration, penetration testing (commissioned but not conducted), software development, or system administration. Clear delineation in the contract prevents scope conflicts.

A legally sound CISO-as-a-Service mandate must contain the following elements: personal designation (first and last name of the appointed CISO, not just the company), proof of qualifications as a contract component, scope of services with concrete hourly or task structure.

Accessibility and response times for security incidents — for NIS-2-obligated companies, the 24-hour initial report to the BSI must be guaranteed. Reporting obligations: frequency, format, recipient group. Data processing agreement per Article 28 GDPR if personal data is processed. Handover arrangement: knowledge transfer and documentation handover at mandate end.

A contract without an accessibility guarantee for incidents is insufficient for NIS-2-obligated companies. The clock starts from the moment of knowledge — and knowledge often arises outside regular business hours.

Section 38 BSIG assigns personal responsibility to management for implementing NIS-2 measures. This personal responsibility cannot be delegated away to an external service provider. Management remains liable — the CISO as a Service bears operational responsibility for measure coordination.

This means: management must formally appoint the CISO, allocate resources for the ISMS, and actively receive the CISO's reports. Section 38 BSIG also requires management to complete information security training themselves.

A good CISO-as-a-Service provider makes this division of responsibility transparent: they document which decisions management must make and produce verifiable reports demonstrating that leadership was informed. In the CIVAC workspace, this reporting line is structurally mapped.

The market for CISO-as-a-Service providers is heterogeneous. Some providers are traditional IT consulting firms offering the model as a supplementary service. Others are specialised Managed Security Service Providers (MSSPs) that combine the CISO function with technical SOC operations.

For companies that primarily need regulatory compliance (NIS-2, ISO 27001) — without SOC operations — a provider with a compliance platform backbone is structurally superior: proof is generated in the system, not as a PDF report. Compare providers on four criteria: qualifications of the appointed person, platform integration, industry experience, and contractual transparency. Further information at CIVAC FAQ.

The CISO as a Service is frequently not the only officer role a company requires. In parallel, a Data Protection Officer (Article 37 GDPR), a Compliance Officer (IDW PS 980), or an Anti-Money Laundering Officer (Section 7 GwG) may be required. Coordinating multiple externally appointed roles can become complex when each role runs through a different service provider.

CIVAC offers all 25 officer roles from one platform — from the occupational health and safety specialist to the hazardous incident officer. The combined model allows: internal employees for certain roles licence the workspace; external officers are appointed via the Officer-as-a-Service. All roles share the same workspace, the same documentation, the same audit log.

More on available roles at Compliance Officer at CIVAC.

Structured onboarding of a CISO-as-a-Service mandate consists of four phases. Phase 1, kickoff and gap analysis (1 to 2 weeks): inventory of existing security measures, IT architecture overview, NIS-2 classification identification. Phase 2, ISMS initialisation (4 to 8 weeks): scope definition, risk analysis, creation of missing baseline documents (ISMS policy, risk assessment methodology, SoA).

Phase 3, ongoing operations (from month 3): establish task cadences, launch training programme, activate reporting line, test NIS-2 reporting processes. Phase 4, certification preparation (optional, from month 6): internal audit, management review, registration with certification body.

In the CIVAC workspace, the entire onboarding runs on the platform: the project module guides through the five core steps of scope, uploads, queries, risks, and reporting. All work results are immediately documented.

NIS-2 and ISO/IEC 27001:2022 require designated, competent security responsibility. CISO as a Service is the structured response to this requirement for companies without a full-time position. CIVAC combines compliance platform and Officer-as-a-Service: licence the workspace for your internal officers — or have a certified CIVAC partner appointed as CISO.

Appointment certificate, signed, filed, verifiable — within two business days. Data residency exclusively in the EU. Turn reading into action: info@civac.de.