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Important information
Contract type:
Freelance / Contract
Daily rate:
Salary according to profile
Location:
Brussels, Belgium
Work mode:
Hybrid
Published on:
26 October 2026
What they need
Context
Scope focused on Mission Critical systems and strategic projects and programs.
Missions
Define, design and validate target architectures for Mission Critical systems
Cover IT, OT, cloud and railway environments
Embed the principles of Cyber Resilience by Design, Security by Design, Zero Trust and Operational Resilience
Carry out architecture analyses and studies
Conduct business impact analyses
Perform risk analyses
Identify vulnerabilities, critical dependencies and single points of failure
Ensure the compliance of architectures and solutions
Apply regulations, standards and frameworks such as NIS2, CER, CRA, ISO 27001, ISO 22301, IEC 62443 and EN 50701
Support project teams, architects, asset owners and suppliers
Define and implement architecture, security, availability and resilience requirements
Assess technology solutions, proposed architectures and suppliers
From a business criticality perspective
From a cybersecurity perspective
From an operational resilience and lifecycle perspective
Ensure architectural consistency
Align architectures with strategic objectives
Align architectures with service continuity requirements
Align architectures with the criticality levels Mission Critical, Business Critical, Business Essential and Business Support
Contribute to enterprise architecture governance
Take part in architecture reviews
Take part in decision-making committees
Contribute to the continuous improvement of the organization’s cyber-resilience maturity
Promote standardization, simplification and control of technology dependencies
Strengthen the robustness and sustainability of critical services
Ensure traceability of requirements and risks
Link business needs, business capabilities, services, assets, security controls and regulatory requirements
Guarantee consistent and auditable risk management
Conditions
Desired start date: 01/01/2027
End date: 31/12/2031
Available for on-call duty
Profile wanted
10+ years of experience
At least 2 years in IT/OT/railway cybersecurity and secure architectures
At least 5 years applying Safety and Security by Design principles
At least 5 years with the NIS2, ISO 27001, IEC 62443, CIS and NIST standards and regulations
At least 5 years in risk analysis and vulnerability management
At least 5 years with cloud, network, systems, OT and critical infrastructure environments
At least 5 years assessing technical solutions and architectures from a security perspective
Strong knowledge of IT/OT/railway cybersecurity and secure architectures
Proficiency with Safety and Security by Design principles
Experience with NIS2, ISO 27001, IEC 62443, CIS and NIST standards and regulations
Expertise in risk analysis and vulnerability management
Experience in cloud, network, systems, OT and critical infrastructure environments
Ability to perform security assessment of technical solutions and architectures
Ability to integrate into teams
Presentation skills and professional attitude
Clear and effective communication
Responsible commitment for the full duration of the contract
Languages: Dutch or French at C1 level, English at B2 level
Available for on-call duty
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