Senior Network Security Engineer

About Datacenter Luxembourg:

We are a leading provider of IT Managed Services, specialising in Cloud, Connectivity, Cyber Security & Resilience, and Data Centre Technologies. At Datacenter Luxembourg, innovation and quality of service drive everything we do. Our team of dedicated professionals crafts tailored solutions for clients across complex, demanding environments.

Role Description

As a Senior Security & Network Engineer at Datacenter Luxembourg, you will be at the forefront of designing, securing, and optimizing our network infrastructure. This role combines deep technical expertise with a strategic approach to cybersecurity, ensuring high availability, resilience, and protection against evolving threats.

You will play a key role in implementing robust security measures, troubleshooting complex network issues, and driving continuous improvements.

Responsibilities

• Design, provision, and maintain network and security infrastructure (routing, switching, firewalls, load balancers, circuit provisioning)
• Own performance monitoring, capacity planning, and outage resolution
• Define and enforce security policies, access controls, and hardening standards
• Configure security platforms and develop tooling to automate vulnerability mitigation
• Drive controlled changes through established change management frameworks
• Maintain system patching, configuration standards, and compliance alignment
• Produce assessment reports with clear findings and actionable recommendations
• Deliver L2/L3 escalation support for network and security incidents
• Contribute to pre-sales engagements, from technical scoping to client-facing discussions

Profile & Experience

• Master's degree in IT or equivalent practical experience
• 4+ years in networking and security, ideally within an ISP, MSP, or cloud provider
• Strong knowledge of networking protocols (BGP, MPLS, IS-IS, MACSEC, L2VPN, L3VPN, IPsec, OSPF, 802.1X, QoS, VLANs, MSTP, LACP, Lag/MC-Lag, VRF, EVPN-VxLAN...)
• Experience with firewalls (UTM, NGFW) ideally Fortinet or Sophos
• Security solutions: HTTP/S Inspection, Application control, WAF, IDS/IPS, Web protection, EDR/XDR, SIEM
• Good understanding of authentication services (AD, ADFS, LDAPS, RADIUS, MFA)
• Experience with virtualization and cloud environments
• Knowledge of SD-WAN and SASE frameworks is a plus
• Experience working in production environments with availability constraints
• Certifications (Cisco, Juniper, Fortinet, etc.) are a plus.

What We Offer

• A technically challenging role with real ownership over critical infrastructure
• Exposure to a broad technology stack across network, security, cloud, and managed services
• Support for professional development and certification training
• A collaborative culture with flat hierarchies and short decision-making channels
• Direct impact on services delivered to customers

Apply

If you’re looking to take ownership of real infrastructure and build your expertise in a hands-on environment, we should talk.