OneSource Consulting
Network Security Engineer
OneSource ConsultingBelgium3 days ago
Full-timeRemote FriendlyInformation Technology

ROLE: NETWORK AND SECURITY ENGINEER

LOCATION: BRUSSELS, BELGIUM

CONTRACT DURATION: 6 MONTHS WITH POSSIBLE EXTENSION

LANGUAGE: FRENCH OR DUTCH, ENGLISH

WORK MODE: HYBRID (2-3 DAYS ON-SITE PER WEEK)

Job Description -

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 centres interconnected via Ethernet & Fibre Channel
  • Cisco switches & routers
  • Palo Alto, FortiGate & Juniper firewalls
  • F5 BigIP LTM
  • Cisco Call Manager

Specific competences needed

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 behaviour.

Nice to have

  • Certifications such as CCNP/CCIE, Palo Alto next gen firewall engineer or Fortinet NSE
  • Experience with IPv6
  • Experience with Cisco Catalyst centre
  • 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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