Network & Security Engineer (8 years experience)

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