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Cyber security and operational resilience

Understand exposure. Build resilience that can be demonstrated.

Security decisions need a clear view of what matters, what could fail and which controls work in practice. I connect technical findings with management responsibility and a realistic improvement plan.

For leaders, security and IT teams reviewing risks, preparing assurance evidence or strengthening the continuity of important services.

Four questions behind a credible security position.

Four questions behind a credible security position.

  1. What must remain protected?

    Identify important services, information and dependencies. Clarify the assessment boundary, relevant threats and the impact of disruption on the organisation.

    An agreed scope and a prioritised view of exposure.

  2. What does the evidence show?

    Review governance, controls, records and available test results. Distinguish documented intentions from implemented measures and evidence that they operate effectively.

    Findings linked to evidence, gaps and assessment limitations.

  3. How ready is the organisation?

    Examine detection, escalation, response, recovery and supplier dependencies. Assess whether responsibilities and continuity arrangements are sufficiently clear and practicable.

    A resilience assessment with operational weaknesses and priorities.

  4. What should change first?

    Prioritise measures by risk, urgency and feasibility. Assign owners and define the evidence needed to verify completion or support a risk-acceptance decision.

    An actionable plan with ownership and verification criteria.

Concrete outputs, agreed to fit the question.

  • An assessment of security governance, controls and material risks.
  • Evidence-linked findings with explicit limitations.
  • A review of continuity, recovery and critical dependencies.
  • A prioritised improvement plan and verification criteria.
NIS2 · ISO/IEC 27001 · NIST CSF 2.0

Relevant requirements, standards and frameworks.

NIS2 operates through national requirements, including Croatia’s Cyber Security Act. ISO/IEC 27001 is a management-system standard; NIST CSF 2.0 is a cyber risk framework. CER concerns broader resilience of critical entities where applicable. We establish the relevant scope before using these references; a review does not itself certify compliance.

Official reference points

These sources provide context. Applicability and current requirements are checked for the specific engagement.

Content reviewed

Technical evidence with organisational context.

My experience combines ICT leadership, information security management and more than 50 expert engagements concerning cybercrime, security incidents and ISMS. Published qualifications include ISO/IEC 27001 Master and ISO/IEC 27032 Senior Lead Cybersecurity Manager. Personal qualifications do not certify a client organisation.

Start a conversation

Which security question needs a clear answer?

Describe the service, concern and decision ahead without including credentials or sensitive incident records. We can agree a suitable assessment scope and a direct channel for confidential evidence.

A clear starting point
The first conversation clarifies your problem, the intended outcome, the available evidence and the possible scope of work. We agree the next step together.


Email
Based in
Zagreb, Croatia

Based in Zagreb. Working in English, Slovenian and Croatian.

Direct enquiry

Tell me what you are working on.

A short outline is enough to start the conversation.

Keep confidential case details and other people’s personal data for an agreed direct exchange.

Your enquiry is received here and forwarded to Phi. Your email is needed so Domen can reply.

Experience supported by specialist qualifications.

Qualifications listed in the professional profile

Certifications

IPMA Level A – Certified Portfolio Director
Portfolio leadership
IPMA official register

Search by certificate number, or enter Domen Verdnik and select Certified Portfolio Director.

Certificate number: A-25

ISO/IEC 38500 Senior Lead IT Corporate Governance Manager
IT governance
PECB certificate verification

Enter first name Domen, last name Verdnik and the certificate number below.

Certificate number: ITCGSLM1005812-2025-04

ISO/IEC 27001 Master (Senior Lead Auditor & Implementer)
Information security
PECB certificate verification

Enter first name Domen, last name Verdnik and the certificate number below.

Certificate number: ISMA1005812-2024-04

ISO/IEC 27032 Senior Lead Cybersecurity Manager
Cyber security
PECB certificate verification

Enter first name Domen, last name Verdnik and the certificate number below.

Certificate number: CSSLM1005812-2024-09

Open CA Distinguished Architect
Enterprise architecture
Certified DPO
Data protection
PECB certificate verification

Enter first name Domen, last name Verdnik and the certificate number below.

Certificate number: DPCDPO1005812-2023-11

Professional appointments

Professional membership

ISACA · Gold level

Member since

Privacy

Updated: 01.11.2026.

Controller and contact. Phi Savjetovanje, Zagreb (registered as PHI SAVJETOVANJE, obrt za poslovne usluge, vl. Domen Verdnik), Ilica 47, 10000 Zagreb, Croatia, is responsible for the business enquiries it receives. For privacy questions or requests, write to domen@phi.com.hr.

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