Senior Infrastructure Architect

Senior Infrastructure Architect (Freelance) 2 Years Brussels Belgium

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About the Role

Our client is seeking a Senior Infrastructure Architect (Freelance) to lead the design modeling and evolution of complex IT systems spanning servers networks storage and cloud. This is a mission-critical freelance opportunity in Brussels where your expertise will directly shape the performance security and scalability of enterprise infrastructure. Youll be at the heart of digital transformation ensuring robust future-ready systems that empower business growth.

Why This Role Matters

As a Senior Infrastructure Architect you will solve high-stakes challenges: ensuring seamless integration of on-premises cloud and hybrid environments embedding cybersecurity at every layer and driving compliance with GDPR ISO27001 and NIS2. Your work will safeguard business continuity enable innovation and set new standards for technical excellence. The future of our clients IT landscape depends on your vision and execution.

What Youll Be Doing

• Analyze business and project-level needs to architect scalable secure and high-performance infrastructure solutions.
• Design technical diagrams model and simulate both new and existing systems.
• Implement and integrate On-Premises Cloud and Hybrid solutions ensuring seamless interoperability.
• Supervise and validate the quality of project deliverables maintaining rigorous technical standards.
• Embed cybersecurity concepts and contribute to the implementation of security and compliance policies (GDPR ISO27001 NIS2).
• Write and maintain comprehensive technical documentation and procedures.
• Actively participate in cyber risk management and propose improvements for system performance and security.
• Collaborate with cross-functional teams to ensure governance and service continuity.
• Champion best practices in ITIL governance and documentation throughout the project lifecycle.

What Were Looking For

• Proven expertise in cloud and hybrid architectures with hands-on experience in both design and implementation.
• Advanced skills in containerization and orchestration (Docker Kubernetes).
• Deep knowledge of virtual physical and storage architecture.
• Strong documentation and governance capabilities with a commitment to clarity and precision.
• Advanced understanding of ITIL frameworks and best practices.
• Experience with Infrastructure as Code (IaC) IaaS and PaaS models.
• Expertise in network protocols and security (firewalls Zero Trust IAM etc.).
• Builder mindset: ownership problem-solving and a drive for impact.
• Ability to work on-site in Brussels at least 3 days per week (partial remote possible).
• Commitment to compliance with GDPR ISO27001 and NIS2 regulations.
• Fluent in English (French or Dutch is a plus).
• Experience in large-scale mission-critical environments is highly valued.

Other Requirements

• This is a freelance position full-time with a mission duration of approximately 2 years (440 man-days renewable up to 880 days).
• Availability to work during business hours (Monday to Friday 7:00 AM to 7:00 PM) with no overtime unless expressly authorized.
• Willingness to comply with our clients Code of Conduct for External Service Providers.
• Ability to coordinate leave with project and service continuity requirements.
• ProUnity is the single point of contact (SPOC) for this mission. For questions contact Henri Couchard MSP Consultant at

Technical Skills

• Cloud & Hybrid Architecture (Expert)
• Containerization & Orchestration: Docker Kubernetes (Advanced)
• Virtual Physical & Storage Design (Expert)
• Documentation & Governance (Advanced)
• ITIL (Advanced)
• IaC IaaS PaaS (Advanced)
• Network Protocols & Security: FW Zero Trust IAM (Advanced)

Language Proficiency

• Fluent English required
• French or Dutch is a plus

Required Experience:

Senior IC