For one of our major clients in Brussels, we are looking for a Senior System Design Engineer / Senior Network Engineer to support the design, deployment, and operation of enterprise network and security infrastructures.
You will act as a technical authority for WAN, LAN, and Wireless environments, combining strong design capabilities with hands‑on operational experience.
Key responsibilities
Evaluate business and technical requirements and translate them into robust system and network designs
Assess design benefits, risks, and trade‑offs, and validate compliance with requirements
Support and oversee the deployment of approved designs into production environments
Design, implement, operate, and optimize enterprise WAN, LAN, and Wireless infrastructures
Act as technical authority for Fortinet and Aruba environments
Perform complex incident resolution and root cause analysis
Use engineering and development tools to address technology evolution, capacity management, and performance optimization
Proactively propose improvements to existing systems, processes, and services
Maintain and update technical documentation through clear and structured technical writing
Participate in on‑call duty, including night operations, for the systems under your responsibility
Required technical competencies
WAN / Security (mandatory)
SD‑WAN architectures
BGP routing
Firewall policy design and rule management
Advanced troubleshooting and debugging
LAN
HPE Aruba switching
Cisco enterprise switching
Core switching environments
VLANs, routing, and redundancy designs
Wireless
Aruba Access Points
Aruba AirWave
Enterprise Wi‑Fi design, optimization, and troubleshooting
General networking
Strong understanding of TCP/IP, routing, and switching fundamentals
Experience with enterprise monitoring, logging, and alerting
Knowledge of high‑availability and failover designs
Profile & experience
5+ years of experience in system engineering, network infrastructure, or system design roles
Proven hands‑on experience in production environments
Ability to work independently and take full ownership of technical domains
Strong analytical thinking, adaptability, collaboration, and result‑driven mindset
Languages
Dutch: C1
French: B1
What can Econocom offer you?
An attractive salary complemented by hospitalization and group insurance, meal and eco vouchers, a company car, and the possibility of working from home.
Upon joining, you will be assigned a Competence Manager who will introduce you to the company and guide your individual career.
Various blended training opportunities that will help you grow professionally.
Econocom is committed to promoting an inclusive and respectful work environment, where every individual is valued regardless of race, gender, age, religion, sexual orientation, disability, or any other characteristic protected by law.
Any form of discrimination is strictly prohibited under our Code of Conduct.
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