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External ISO: Your key to new business – confidently positioned, trustworthy, and ready for immediate deployment.

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Protect your company from security vulnerabilities, recourse claims, and audit-relevant deficiencies. With an external Information Security Officer from aigner business solutions, you bring proven expertise directly into your organization—flexible, predictable, and ready for immediate deployment.

Manage information security professionally—without tying up internal resources.

Establishing and operating an effective Information Security Management System (ISMS) requires deep expertise and continuous attention. However, for many small and medium-sized enterprises, appointing a full-time internal Information Security Officer (ISO) is neither economically feasible nor realistic in terms of staffing.

Furthermore, there is an acute shortage of qualified information security professionals in the job market. The search for internal experts is time-consuming, expensive, and carries high risks in cases of illness or resignation.

An external Information Security Officer assumes all tasks related to strategic and operational information security—from drafting security policies and conducting risk analyses to supporting audits according to ISO 27001, TISAX®, or NIS-2.

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Regulatory Framework: ISO 27001, TISAX®, NIS-2, and the IT Security Act

The appointment of an Information Security Officer is required or strongly recommended by numerous legal and industry-specific mandates:

  • DIN ISO 27001 & BSI IT-Grundschutz: Mandatory integration of the ISO role to steer, monitor, and continuously develop the ISMS.
  • TISAX® (Automotive Industry): Proof of a dedicated information security function as a core prerequisite in the VDA ISA assessment.
  • NIS-2 Directive: Clear requirements regarding governance-level responsibility and oversight of risk management measures.
  • Avoidance of Conflicts of Interest: Separation of the ISO function from operational IT management or executive management to ensure objective control.
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Risks of Operating Without a Qualified ISO in Your Organization

Without a clearly defined and professionally qualified ISO, critical security gaps and legal liability risks arise in daily operations:

  • Conflicts of Interest for IT Managers: If the IT manager also acts as the ISO, they end up auditing their own systems—a classic dealbreaker in external audits.
  • Outdated Emergency & Security Concepts: Without continuous oversight, policies quickly turn into ineffective paper tigers.
  • Staff Absence & Loss of Expertise: If an internal single point of contact falls ill or leaves, information security management comes to a sudden halt.
  • Inadequate Audit Preparation: Incomplete documentation leads to non-conformities during certification audits under ISO 27001 or TISAX®.
  • Liability Risks for Executive Management: Without expert guidance, managing directors face personal liability in the event of security incidents.
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The Solution: The External ISO as a Strategic Partner on an Equal Footing

An external ISO provides the independence and expertise essential for neutral, audit-compliant security management. Acting as a bridge between executive management, IT departments, specialized business units, and external auditors, our service directly resolves key operational challenges:

  • Lack of internal expertise regarding current threat landscapes and regulatory updates.
  • High fixed costs for the continuous training and qualification of internal staff.
  • Overburdened IT teams caused by time-consuming documentation and audit duties.
  • Uncertainty in fulfilling customer requirements and vendor security questionnaires.


With an external ISO from aigner business solutions, you secure a complete interdisciplinary team of experts in the background - at predictable, manageable costs.

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Our Service

We assume the full role of the Information Security Officer or support your internal ISO as a strategic sounding board.

Strategic Security Management & Governance

  • Definition and continuous improvement of the information security strategy and objectives.
  • Creation, revision, and implementation of security policies and work instructions.
  • Regular reporting to executive management regarding security status and risk exposure.

Operative ISMS Management & Risk Analysis

  • Execution and documentation of risk assessments and formulation of risk treatment plans.
  • Management of asset classification and protection of critical corporate assets.
  • Completion of customer security questionnaires and support during B2B tendering processes.

Audits, Training & Incident Response

  • Planning and execution of internal audits to verify security measures.
  • Design and delivery of security awareness training for employees and executives.
  • Incident management coordination and support during root-cause analysis.
  • Guidance and preparation for external certification audits (e.g., ISO 27001, TISAX®).

What makes us strong:

Experience & expertise

Our external ISOs hold comprehensive certifications (e.g., CISA, CISM, TÜV-ISO) and draw upon our company's collective expertise.

  • Interdisciplinary Background Team: Your external ISO can access our team's specialized legal counsel, data protection experts, and IT security specialists at any time.
  • 20+ Years of Experience: Extensively battle-tested best practices from numerous client projects across mid-sized businesses and industrial enterprises.
  • Complete Independence: Zero conflicts of interest regarding internal IT infrastructure or software vendors.
Industry focus & practical relevance

We do not offer rigid consulting contracts; instead, we tailor the scope of support precisely to your company's size, industry, and risk profile.

  • Full Cost Control: Predictable monthly flat rates instead of unpredictable personnel costs and training budgets.
  • Fail-Safe Security: Through our internal coverage arrangements, your information security remains seamlessly maintained even during holidays or illness.
  • Pragmatic Solutions: We develop clear, understandable security guidelines that your employees accept and actively put into practice.
Full-service support

Holistic Support: From Appointment to Ongoing Operations
We take full responsibility and guide your information security into the future in a structured manner.

  • Step 1: Onboarding & Assessment – Evaluating the current status, reviewing existing concepts, and officially appointing the external ISO.
  • Step 2: Action Roadmap & Quick Wins – Eliminating urgent security gaps and establishing the annual audit plan.
  • Step 3: Ongoing Operations – Conducting regular audits, delivering training sessions, monitoring key metrics, and advising executive management.
  • Step 4: Audit Support & Certification – Providing expert guidance during external assessments and continuously optimizing the ISMS.
Learn more about us

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FAQ – External ISO

What is the role of an Information Security Officer (ISO)?

The ISO is responsible for planning, directing, monitoring, and continuously improving information security within the organization. They advise executive management on all IT security matters, draft policies, conduct risk analyses, and prepare the company for certifications (e.g., ISO 27001, TISAX®).

Why is an external ISO often better than an internal appointment?

An external ISO avoids conflicts of interest (e.g., when the IT manager serves as the ISO at the same time) and brings deep expertise from a wide range of industries. Furthermore, it eliminates high recruitment, salary, and continuing education costs, as well as the risk of downtime due to illness or resignation.

Can the IT manager or Data Protection Officer simultaneously serve as the ISO?

The combination of IT management and ISO is viewed critically by certification bodies and auditors due to an inherent conflict of roles: the IT manager would be required to objectively monitor their own systems and processes. Separating the Data Protection Officer (DPO) and ISO roles is also advisable, as the DPO primarily safeguards personal data, whereas the ISO oversees all corporate data and assets.

How much time does an external ISO spend on our company?

The time commitment depends on your company size, the complexity of your IT landscape, and your target certification level. Support is typically delivered through a fixed monthly allocation that can be flexibly adapted to upcoming projects (such as audits or BIAs).

Is an external ISO recognized for ISO 27001 or TISAX® certifications?

Yes, without reservation. Both ISO 27001 and the VDA ISA catalog (TISAX®) explicitly allow the ISO role to be filled by qualified external service providers. The only key requirement is that the external ISO is granted the necessary authority and reports directly to executive management.

How does the day-to-day collaboration work?

Your external ISO works for your company on a regular basis (either on-site or remotely). They serve as the dedicated contact person for your teams on security inquiries, execute planned projects, and report directly to executive management at structured intervals.