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Senior Network / Security Engineer


Luxembourg, LU

For our IT Department in Luxembourg, we are currently looking for a Senior Network / Security Engineer.




The senior network security engineer will be responsible for coordinating and challenging Infrastracture Projects and solutions, as well as maintaining and developing the existing IT Infrastructure.He/She will be a member of the IT Operations and Services Team within Alter Domus. He/She must be able to work effectively in a fast paced enviroment and under pressure, be self-motivated, with good communication skills.




The Senior Network Security engineer will be responsible for the following activities:

  • Maintaining next generation firewalls, virtual private networks, virus, threat, and malware detection systems, and performing regular audits;
  • Assist in developing effective security policies, tool provisioning, and configuration review/audit;
  • Cross platform knowledge and experience to implement, configure, design, and troubleshoot the WAN/LAN/WLAN technologies in an enterprise environment, encompassing a wide range of transport topologies (WAN, LAN, WLAN), advanced services (high availability, load-balancing, QoS, IP, MPLS, VoIP/IP Telephony) and protocols (TCP/IP, DNS, DHCP, IPSEC, BGP, OSPF );
  • Knowledge of SDWAN technology;
  • Maximizes network performance by monitoring performance; troubleshooting network problems and outages; scheduling upgrades;
  • Secures network system by establishing and enforcing policies; defining and monitoring access;
  • Coordinate vendors and third parties in order to facilitate and speed up problems resolution;
  • Manage and troubleshoot WiFi networks (Cisco WLC);
  • Experience with different proxy servers solutions;
  • Experience with Cisco ISE;
  • Be familiar with Microsoft Windows Technologies ;
  • Infrastructure optimization, security,improve network reliability and performance ;
  • Create and update Project Plans,detailed documentation and diagrams ;
  • Help to implement new processes in order to improve operational effectiveness and organizational synergies ;
  • Drive urgency towards customer lab/field issues with the support organization and internal development teams ;
  • Being familiar with ITIL framework and extensive experience in tickets management and associated workflows.




  • Bachelors Degree;
  • 5 years + of experience as a Network Engineer;
  • CCNP is a strong advantage;
  • Any firewall certification should be considered as an advantage;
  • Team player with strong interpersonal skills;
  • Able to interact with all levels of management;
  • Fluent in English (written and spoken);
  • Must be willing to travel to branch offices, as needed.