Network & security Architect/Lead Engineer - Brussel (freelance)
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- Design and develop Network & Security architectures, including HLD and LLD
- Define technical roadmaps, standards and scalable solutions
- Lead and support datacenter projects, migrations and transformation initiatives
- Translate business and technical requirements into robust technical designs
- Review implementations and ensure technical quality
- Participate in hands-on engineering, L3 troubleshooting and critical incident resolution
- Act as a technical reference for the Network & Security team
- Coach and support other engineers
- Work closely with internal stakeholders and external technology partners Technical environment You bring strong senior-level experience in enterprise Network & Security environments, particularly with:
- Cisco Nexus and Cisco ACI
- Palo Alto NGFW and Prisma
- Firewalling, VPN, segmentation and Zero Trust concepts
- VMware NSX
- Datacenter networking
- High-availability and mission-critical environments
- Multi-vendor enterprise infrastructures Experience with network automation, scripting and CI/CD is considered an advantage.
Your profile
- Typically 8+ years of Network & Security experience
- Proven experience in network architecture and design
- Strong hands-on Cisco ACI experience – mandatory
- Experience leading complex infrastructure migrations or transformation projects
- Able to combine architecture, governance and operational troubleshooting
- CCNP or higher, or equivalent expertise gained through experience
- PCNSE and/or Cisco ACI certification is a strong advantage
- Strong analytical and problem-solving skills
- Comfortable communicating with both technical teams and stakeholders
- Fluent in Dutch and English Assignment
Location:
Brussels, near Brussels-North station Hybrid: approximately 1 day per week onsite Duration: 12 months, renewable Workload: Full-time Start: ASAP Contract: Freelance / Time & Material Maximum rate: €600/day excl. VAT
Profil Recherché
We are looking for a Senior Network & Security Architect / Lead Engineer with typically 8+ years of experience in complex enterprise Network & Security environments. The ideal candidate combines a strong architectural mindset with a hands-on engineering approach and is comfortable moving between design, governance, implementation and advanced L3 troubleshooting. Strong practical experience with Cisco ACI is essential , alongside solid expertise in Palo Alto, datacenter networking, firewalling, VPN, segmentation and high-availability environments . Experience with VMware NSX , complex migration or transformation projects, and multi-vendor environments is also expected. You should be able to produce HLD/LLD designs and technical roadmaps , translate business requirements into scalable technical solutions, lead complex technical initiatives, and act as a technical reference for other engineers. A CCNP-level certification or equivalent experience is expected. PCNSE and/or Cisco ACI certifications are strong assets. Experience with network automation, CI/CD or scripting is considered a plus. Strong communication and stakeholder management skills are important, as well as the ability to coach and share knowledge within the team. Fluency in Dutch and English is required. The role requires approximately one day per week onsite in Brussels . Présentation De La Structure Our client is a major European technology and IT services group with Belgian roots , supporting large private and public-sector organisations in their digital transformation and the management of complex IT environments. The company operates across areas including cloud and infrastructure, cybersecurity, networking, managed services, applications, data & AI, and digital workplace solutions . Its teams design, implement and operate business-critical technology environments, from major transformation programmes to long-term managed services. For this assignment, you will work within a large Belgian public-sector environment , where security, availability, resilience and infrastructure modernisation are key priorities. You will join an experienced Network & Security team responsible for complex enterprise and datacenter environments.
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