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We are looking for a senior network & security engineer to reinforce our Network & Security team. This role is both hands-on and technical lead oriented (50/50). You will stabilize, maintain, and oversee a complex hybrid infrastructure while mentoring junior team members and acting as the go-to escalation point. You will report directly to the Head of Infrastructure and collaborate closely with the dedicated Risk & Security team.
Main Responsibilities
Oversight of routing & switching infrastructure (Cisco-based environment)
Oversight of firewalling and perimeter security (Palo Alto, Fortigate, Juniper)
Oversight of load balancing (F5 BigIP LTM)
Oversight of Cisco Call Manager infrastructure
L3 escalation support for internal IT teams
Maintain, monitor, and stabilize hybrid cloud connectivity
Coordinate with telecom providers, partners and external vendors
Empower and mentor junior team member
Ensure documentation and operational best practices
Technical environment
Hybrid multi-cloud: AWS & Azure
Connectivity: Megaport, Equinix
Two Belgian data centers interconnected via Ethernet & Fibre Channel
Cisco switches & routers
Palo Alto, Fortigate & Juniper firewalls
F5 BigIP LT
Cisco Call Manager
What we are looking for
Must have
8+ years of experience in network engineering
Strong expertise in enterprise routing & switching
Proven hands-on experience with:
Cisco Catalyst switches and routers
Palo Alto and/or Fortigate firewalls
F5 bigIP LTM
Experience working in hybrid cloud-connected environments
Solid troubleshooting skills (L3 level)
Professional English (written & spoken)
Have a clean certificate of good behavior.
Nice to have
Certifications such as CCNP/CCIE, Palo Alto next gen firewall engineer or Fortinet NSE
Experience with IPv6
Experience with Cisco Catalyst center
Experience with scripting/automation languages (Python, Ansible and/or terraform)
Experience in financial services environments
Experience with Linux RedHat
Experience with traditional Microsoft products
Experience with vulnerabilities management tools
Soft skills
Operationally strong and comfortable in complex environments
Structured, documentation-oriented mindset
Calm and pragmatic under pressure
Capable of balancing hands-on work with technical coordination
Natural mentor with strong communication skills
Autonomous and delivery-focused
Key Skills
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