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Important information
Contract type:
Permanent contract
Salary / Daily rate:
Salary according to profile
Location:
Leuven, Belgium
Starting date:
2 to 4 weeks
Work mode:
Onsite, Hybrid
Published on:
9 April 2026
What they need
Context
As a Senior System Engineer, you will play a key role in the design, implementation, operation, and optimization of enterprise network and security infrastructures. You will be the technical authority for WAN, LAN, and Wireless environments, with deep expertise in Fortinet, Aruba. This role requires strong troubleshooting capabilities, hands‑on operational experience, and the ability to work independently.
Missions
- Design, implement, operate, and optimize enterprise network and security infrastructures
- Serve as the technical authority for WAN, LAN, and Wireless environments
- Troubleshoot complex network and security issues independently
- Manage firewall rule design and policy management
- Ensure high availability and failover designs are implemented and maintained
Tools & Environment
WAN / Security
- Fortinet (FortiGate, FortiManager)
- SD‑WAN architectures
- BGP routing
- IPsec VPN technologies
- Firewall rule design and policy management
- Advanced troubleshooting and debugging
LAN
- HPE Aruba switching
- Cisco enterprise switching
- Core switching environments
- Aruba Central (on‑prem)
- VLANs, routing, redundancy
Wireless
- Aruba Access Points
- Aruba AirWave
- Enterprise Wi‑Fi design and troubleshooting
General Networking
- Strong understanding of TCP/IP, routing, and switching fundamentals
- Experience with enterprise network monitoring and logging
- Knowledge of high‑availability and failover designs
Profile wanted
- Strong troubleshooting capabilities and hands‑on operational experience
- Ability to work independently
- Expertise in Fortinet (FortiGate, FortiManager)
- Experience with SD‑WAN architectures
- Knowledge of BGP routing and IPsec VPN technologies
- Skills in firewall rule design and policy management
- Experience with HPE Aruba switching and Cisco enterprise switching
- Familiarity with core switching environments and Aruba Central (on‑prem)
- Understanding of VLANs, routing, redundancy
- Experience with Aruba Access Points and Aruba AirWave
- Knowledge of enterprise Wi‑Fi design and troubleshooting
- Strong understanding of TCP/IP, routing, and switching fundamentals
- Experience with enterprise network monitoring and logging
- Knowledge of high‑availability and failover designs
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