About this role
As a Network & Security Architect / Lead Engineer , you will join the Network & Security Team and play a key role in the design, evolution and implementation of the network and security landscape within a complex enterprise environment. The assignment combines approximately 50% architecture and design with 50% hands-on engineering and troubleshooting . Your main responsibilities will include: Defining and developing Network & Security architectures , including HLD and LLD Establishing technical roadmaps and standards Leading and supporting datacenter projects and migrations Translating business and technical requirements into scalable solutions Reviewing implementations and ensuring technical quality Contributing directly to operational support and complex L3 troubleshooting Supporting critical incidents and problem analysis Coaching and guiding engineers within the team Collaborating with internal stakeholders and external partners This role requires a senior professional who can combine architectural thinking, technical leadership and hands-on expertise in a complex Network & Security environment. We are looking for a Senior Network & Security professional , typically with 8+ years of experience , combining proven architecture and design expertise with a strong hands-on engineering background. You have practical experience in complex enterprise and datacenter environments and are comfortable acting both as a technical architect and as a senior engineer involved in implementation and L3 troubleshooting. Required expertise Strong experience in Network & Security architecture and design Practical Cisco ACI experience - mandatory Cisco Nexus Palo Alto NGFW and Prisma Firewalling, VPN, segmentation and Zero Trust VMware NSX Load balancing High-availability and mission-critical environments Multi-vendor enterprise environments Experience with complex migration and transformation projects Cisco certification ( CCNP or higher ) or equivalent expertise through experience Experience with network automation, CI/CD and/or scripting is considered an advantage. PCNSE and/or Cisco ACI certifications are strong assets. You combine an architectural mindset with a hands-on approach , have strong analytical and problem-solving skills, and communicate effectively with both technical teams and stakeholders. You are comfortable coaching engineers, sharing knowledge and acting as a technical reference within the team. Fluent Dutch and English are required. Job Benefits Long-term assignment: 12 months+, renewable Hybrid working: approximately 4 days remote and 1 day per week onsite in Brussels Full-time assignment Work within a complex, enterprise-scale public-sector environment Combination of architecture/design and hands-on engineering Exposure to business-critical Network & Security infrastructure Opportunity to act as a technical reference and coach within the team Freelance / Time & Material contract