{"id":1171478,"url":"https://alion.io/job/phoenix-technologies-f5-networking-and-security-engineer","title":"F5 Networking and Security Engineer","company":{"id":100200,"name":"Phoenix Technologies","domain":"phoenix-tech.eu","url":"https://alion.io/company/phoenix-technologies","size_band":null,"is_staffing_agency":false,"employer_type":"direct","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":"inferred","locations":[],"countries":[],"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":[],"status":"live","first_seen_at":"2026-09-17T13:54:04Z","employer_posted_date":null,"last_verified_at":"2026-09-17T13:54:04Z","board_verified":false,"closed_at":null,"days_open":25,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":25},"description":"We are seeking an experienced F5 Networking and Security Engineer to join our team. In this role you will design, implement, and manage F5 BIG-IP solutions for application delivery and network traffic management.\nKey responsibilities\nDesign and architect load balancing and high-availability solutions.\n\nConfigure and administer virtual servers, pools, nodes, monitors, iRules, SSL profiles, and traffic policies.\n\nManage SSL/TLS certificates, SSL offloading, and traffic inspection.\n\nDeploy and maintain Web Application Firewall (WAF) and Access Policy Manager (APM) services.\n\nPerform performance tuning, capacity planning, and service optimization.\n\nProvide incident, problem, and change management support.\n\nExecute security patching, software upgrades, and lifecycle management of F5 infrastructure.\n\nAnalyze root cause of application delivery, connectivity, and performance issues, and produce documentation.\n\nRequired qualifications\nBachelor’s or master’s degree in electronics, ICT, or telecommunications, or equivalent technical experience.\n\nIn-depth conceptual and operational knowledge of IP networks in multi-site data centre environments.\n\nAdvanced expertise in F5 solutions, including design and implementation in complex environments.\n\nStrong understanding of IT security concepts and architectures, including experience with Checkpoint and Palo Alto firewalls.\n\nExcellent communication skills and ability to work independently and methodically.\n\nFluency in Dutch, French, and English.\n\nNice to have\nExperience with automated scripting for F5 configuration management.\n\nKnowledge of network traffic analysis and monitoring tools.\n\nInterested? 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