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F5 Network & Security Engineer (Job #260902)

Location: Brussels (Hybrid - max 3 days/week remote) Client: Energy Sector Language: Dutch, French, and English Offer deadline: 30/09/2026

Tasks and Responsibilities:

Mission Context

Join a key player in the energy sector as an F5 Network & Security Engineer. The F5 BIG-IP solution is an important central component within the datacenter infrastructure and is heavily used to implement application load balancing, high availability concepts, and security features.

You will work within the IP Networks team, part of the Datacom department, which manages the datacom transport network, IP/Ethernet/WiFi networks, security infrastructure (firewalls, DMZs, VPN concentrators, load balancers), and critical networks connecting high-voltage substations and data centres.

 

 Tasks and Responsibilities

  • Design load balancing and high-availability architectures
  • Design and implement F5 BIG-IP solutions for application delivery and network traffic management
  • Configure and administer virtual servers, pools, nodes, monitors, iRules, SSL profiles, and traffic policies
  • Manage SSL/TLS certificates, SSL offloading, encryption configuration, traffic inspection, and reporting
  • Deploy and manage Web Application Firewall (AWAF) policies
  • Integrate authentication and access management using APM and enterprise identity services
  • Perform performance tuning, capacity planning, and service optimization
  • Provide incident, problem, and change management support
  • Manage security patching, software upgrades, and lifecycle management of F5 infrastructure
  • Conduct root cause analysis and troubleshooting of application delivery, connectivity, and performance issues
  • Create documentation, operational procedures, and facilitate knowledge transfer to stakeholders

General skills:

  • Ability to work independently and methodically with strong sense of responsibility
  • Accurate risk assessment capabilities
  • Customer-oriented with good stress management
  • Flexible and approachable (able to handle urgent operational interruptions)
  • Strong communication skills for interacting with colleagues, departments, suppliers, and service providers
  • Willingness to continuously refine and broaden technical knowledge

Specific skills:

F5 Technologies:

  • F5 BIG-IP (LTM, GTM, ASM, APM)
  • iRules, SSL profiles, traffic policies
  • Virtual servers, pools, nodes, monitors
  • SSL/TLS certificate management
  • Web Application Firewall (AWAF)
  • APM (Access Policy Manager)

Network & Security:

  • IP Networks in multi-site environments and datacenters
  • IT security concepts, architectures, and implementations
  • Checkpoint and Palo Alto firewall technology (knowledge)

Skills Required:

F5 BIG-IP, LTM, GTM, ASM, APM, iRules, SSL/TLS, Load Balancing, High Availability, Web Application Firewall, AWAF, IP Networks, Network Security, Firewalls, Checkpoint, Palo Alto, Datacenter Infrastructure, Application Delivery, Traffic Management, Capacity Planning, Performance Tuning, Incident Management, Change Management, Problem Management, Documentation, Knowledge Transfer

How to Apply:

  1. Your updated CV
  2. Your self-assessment of the specific skills listed above (indicate your level for each: Beginner / Junior / Advanced / Expert)
  3. Your expected daily rate
  4. Confirmation of your availability (start date and hybrid work model)
  5. Confirmation of language proficiency (Dutch, French, and English)

Be sure to include the job title "F5 Network & Security Engineer" and the reference JD260902in the subject line of your email.

Send CV + cover letter to jobs@rwavesit.com and CC contact@rwavesit.com

Be sure to include the job title in the subject line of your email. We look forward to reviewing your application

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