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Security Consultant (Senior) - Vlaamse Belastingdienst

Customer: Vlaamse Belastingdienst Vaartstraat 16, 9300 Aalst
Dates: 2026-12-01 — 2027-05-31
Arrangements: 100% full-time; daytime work; homeworking possible; estimated 800 hours per person. On-site frequency not specified.
Apply before: 2026-10-31

Description

The Flemish Tax Administration is seeking one Senior Security Consultant for its Ellipsgebouw location. The assignment focuses on information security risk analysis, policies, processes and governance. The preferred assignment period runs from 1 December 2026 to 31 May 2027. The work regime is 100%, with an estimated 800 hours per person and homeworking possible.

The consultant will conduct risk analyses and draft information security guidelines. The role also involves developing information security processes and monitoring and reporting on compliance. Supporting security architects with legal provisions and risk analyses is another explicit responsibility. ISO27005 risk analysis experience, knowledge of security controls frameworks and NIS2 knowledge are mandatory.

Applicants must demonstrate at least five years of senior security consultancy experience in a relevant environment and Dutch proficiency at CEFR C2. Experience with security management frameworks, expertise-related certifications, FAIR and MITRE ATT&CK are preferred. Candidate evaluation weighs quality and price equally. The engagement is managed through Public-Sourcing under the Flemish government Framework Agreement 2022–2027, Lot 1.

Top Reasons to Apply
Shape security governance
★★★★★
Apply ISO27005 expertise
★★★★★
Support security architects
★★★★★
Address NIS2 compliance
★★★★★
Homeworking possible
★★★★★
Responsibilities
Conduct risk analyses
Draft information security guidelines
Develop information security processes
Monitor and report information security compliance
Support security architects on legal provisions and risk analyses
Must Have
Security consultancy experience
Policy and process drafting
ISO27005 risk analysis experience
Security process governance experience
Information security domain expertise
Security controls framework knowledge
NIS2 knowledge
Dutch CEFR C2 proficiency
Nice to Have
Security management framework experience
Domain relevant security certifications
FAIR method knowledge
MITRE ATT&CK framework knowledge

Detailed Responsibilities and Skills

General skills

  • At least 5 years of demonstrable senior Security Consultant experience in at least one environment such as data, infrastructure or applications.
  • Demonstrable experience drafting policy documents and processes.
  • Demonstrable experience analysing, optimising and documenting security processes and governance.
  • Dutch-language proficiency at European CEFR level C2.

Technical skills

  • Demonstrable experience conducting risk analyses according to ISO27005.
  • Demonstrable expertise in a specific information security domain. Examples in the description: implementing information security management processes; vulnerability analyses and penetration tests; cost-effective application security optimisation; implementing Privileged Access Management; implementing encryption solutions. These are examples, not individually mandatory specialisms.
  • Demonstrable knowledge of information security control frameworks such as Secure Controls Framework and ISO27002.
  • Demonstrable knowledge of NIS2.
  • Demonstrable experience with security management techniques and/or frameworks, for example ISO27000 series, COBIT for Security, NIST, OWASP and CIS Critical Security Controls for Effective Cyber Defense. Explicitly Should have in Skills; also stated without a priority in Description.
  • Demonstrable knowledge and experience through certifications appropriate to the expertise domain, for example CISM, CISSP or CEH. The certificates are examples, not three independently required certificates. Explicitly Should have in Skills; also stated without a priority in Description.
  • Demonstrable knowledge of the Factor Analysis for Information Risk (FAIR) method.
  • Demonstrable knowledge of the Mitre ATT&CK framework.