{"id":4299473,"url":"https://alion.io/job/catamania-network-security-engineer","title":"Network & Security Engineer","company":{"id":183709,"name":"Catamania","domain":"catamania.com","url":"https://alion.io/company/catamania","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Security","role_family":"Security","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Luxembourg City, Luxembourg"],"countries":["LU"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"DHCP","optional":false},{"name":"DNS","optional":false},{"name":"OSPF","optional":false},{"name":"TCP/IP","optional":false},{"name":"Zabbix","optional":false},{"name":"Zero Trust","optional":false},{"name":"GCP","optional":true},{"name":"PKI","optional":true}],"status":"live","first_seen_at":"2026-11-14T02:47:09Z","employer_posted_date":null,"last_verified_at":"2026-11-14T02:47:09Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"About the Role\n\nWe are looking for an experienced Network & Security Engineer to support the administration, maintenance and evolution of network and datacenter infrastructures.\n\nThe consultant will contribute to day-to-day operations, complex troubleshooting, infrastructure modernization and network security projects, ensuring the performance, availability and security of critical IT environments.\n\nKey Responsibilities\n\nAdminister, maintain and develop network and security infrastructures.\n\nDiagnose and resolve complex network incidents.\n\nParticipate in network architecture, migration and deployment projects.\n\nMonitor and optimize network performance.\n\nManage routing and switching across Layer 2 and Layer 3 environments.\n\nMaintain technical documentation, operating procedures and network diagrams.\n\nPerform datacenter operations, including equipment installation, replacement, racking and commissioning.\n\nManage copper and fibre-optic cabling.\n\nCollaborate with infrastructure, security and project teams.\n\nRequired Technical Skills\n\nNetworking & Routing\n\nStrong knowledge of TCP/IP, OSI model, subnetting, VLANs, trunking, NAT, DHCP and DNS.\n\nHands-on experience with Layer 2 switching and Layer 3 routing.\n\nKnowledge of static routing, OSPF and BGP.\n\nExperience with Cisco Nexus and Cisco Catalyst.\n\nNetwork Security\n\nExperience with firewalls: Check Point, Palo Alto and/or Fortinet.\n\nKnowledge of Network Access Control (NAC) and Cisco ISE.\n\nUnderstanding of 802.1X, profiling and posture management.\n\nKnowledge of Zero Trust Network Access (ZTNA) and Web Application Firewall (WAF).\n\nMonitoring & Datacenter\n\nExperience with SolarWinds Orion and/or Zabbix.\n\nKnowledge of Cisco Wireless LAN Controller C9800.\n\nHands-on experience with datacenter equipment installation, rack management and commissioning.\n\nCopper and fibre-optic cabling.\n\nNice to Have\n\nKnowledge of Certificates and Public Key Infrastructure (PKI).\n\nExperience with Google Cloud Platform (GCP) networking.\n\nKnowledge of VXLAN.\n\nYour Profile\n\nDegree in IT, Networking, Telecommunications or equivalent experience.\n\nRelevant experience as a Network Engineer or Network & Security Engineer.\n\nStrong analytical and troubleshooting skills.\n\nAutonomous, rigorous and service-oriented.\n\nGood communication and teamwork skills.\n\nGood command of technical English.\n\nValid Category B driving licence and willingness to travel occasionally to different sites and datacenters.\n\nLanguages\n\nEnglish: Good professional level required.\n\nFrench mandatory\n\nKey Information\n\nLocation: Luxembourg\n\nStart: ASAP\n\nDuration: Until 31/12/2027\n\nWorkload: Full-time","description_format":"text","description_chars":2621,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Luxembourg","iso":"LU","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Custom 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