{"id":700946,"url":"https://alion.io/job/telefonica-tech-network-engineer-l3-3rd-line","title":"Network Engineer (L3 - 3rd Line)","company":{"id":53683,"name":"Telefónica Tech","domain":"telefonicatech.com","url":"https://alion.io/company/telefonica-tech","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"A","score":95,"open_postings":10,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":180,"computed_at":"2026-09-26T05:45:00Z"}},"role":"Networking","role_family":"Networking","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Huntingdon, United Kingdom"],"countries":["GB"],"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":"Azure","optional":false},{"name":"Crowdstrike","optional":false},{"name":"FortiGate","optional":false},{"name":"VPN","optional":false}],"status":"live","first_seen_at":"2026-09-03T12:59:31Z","employer_posted_date":"2026-09-03","last_verified_at":"2026-09-26T11:38:15Z","board_verified":true,"closed_at":null,"days_open":23,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":23},"description":"Telefónica Tech (part of the Telefónica Group) is a leading NextGen Tech solutions provider with a highly diversified team of over 6,000 exceptionally skilled employees and +60 nationalities.\nWe serve more than 5.5m customers everyday in over 175 countries, with a global ecosystem of market-leading partners. Global strategic hubs: Spain, Brazil, the UK, Germany.\nThe Telefónica Tech UK&I hub has an end- to-end portfolio of market leading services and develops integrated technology solutions to accelerate digital transformation through: Cloud, Data & AI, Enterprise Applications, Digital Workplace, Cyber Security & Networking.\nValues: Open, Bold, Trusted\nTrusted Partners:\nMicrosoft: Top 3 Service Providers, Azure Expert Status, Fastrack & Inner Circle Partner\nHPE: Platinum Partner - FY23 UK&I Solution Provider of the Year\nFortinet: Elite VIP Program - one of only 2 in the UK\n Palo Alto & Crowdstrike: part of our NextDefense Cyber Security Portfolio\n The L3 Network Engineer is responsible for management, maintenance and support of datacentre network infrastructure, perimeter security systems and management platforms.\nKey Responsibilities:\nSupporting datacentre network and security infrastructure (LAN / WAN / WLAN / Firewalls / Application/VPN, Delivery Controllers etc.)\nTroubleshooting complex network issues, identifying network bottlenecks, and implementing solutions to ensure optimal network performance\nOptimizing network infrastructure to ensure maximum performance and scalability.\nMaintain accurate network documentation, including network diagrams, configurations, and inventory records\nDay-to-day patching, maintenance and operation of the above in secure environments\nContinual improvement of the systems based on changing demands\nLiaising with various departments within the business\nCoordinating with 3rd party suppliers and partners to support, maintain and implement these systems\nIn addition to the above duties and responsibilities the post holder must be prepared to undertake such additional duties which may result from changing circumstances, but which may not of necessity change the general character or level of responsibility to the post.\n Essential;\nExtensive experience of enterprise datacentre/LAN/WAN network management\nExtensive experience of Cisco ACI, switching, routing\nExtensive experience of Cisco and/or Fortigate firewalls\nExtensive experience of network monitoring, troubleshooting and management tools\nCCNP certification\nDesirable;\nFortinet certification\nAruba certification\nJuniper Certification\nInterpersonal Skills;\nArticulate and a clear communicator\nBe a customer advocate\nHave the ability to converse technical terms and definitions to non-technical personnel\nExperience in report writing\nMeticulous with excellent attention to detail\nInterested in Continual Service Improvement\nAble to multitask and handle large amounts of complex information\n Must have the right to live and work in the UK. \nDue to our location, access to own transport is essential.\nMust meet Security Clearance vetting requirements as this is a requirement of the role.\nAny offer would be conditional upon the successful candidate passing a full SC and NPPV3 vetting process.\nKey Words:\nNetwork Engineer - CCNP - Fortinet - Fortigate - Firewalls - Cisco ACI - Networking - Cisco - Virtual Networking - Data Centre - Data Center - SDN\nAt Telefónica Tech, we believe inclusion is the bridge that empowers everyone to be their authentic selves. We celebrate and respect our differences because diversity drives innovation and makes us stronger.\nBe yourself with us, and feel that you belong.\nWe welcome applicants from all backgrounds and identities regardless of age, disability, gender reassignment, marital or civil partnership status, pregnancy or maternity, race, religion or belief, sex, and sexual orientation.\nWe are also committed to equity, accessible hiring practices, and creating an inclusive culture through many means including TogetHer (Women's network) and our Employee Resource Groups which include Diversity and Inclusion, Telefónica Tech Pride, Neurodiversity, ELEVATE (African and Caribbean heritage network), and Sustainability.\nWe don’t believe hiring is a tick box exercise, so if you feel that you don’t match the job description 100%, but would still be a great fit for role, please get in touch.","description_format":"text","description_chars":4353,"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":["Equity"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Information Security"],"lifecycle":[{"event":"open","at":"2026-09-11T02:56:35Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":22,"expected_fill_days":180,"reasons":["conf:11","velocity","win:early"],"computed_at":"2026-09-26T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/telefonica-tech-network-engineer-l3-3rd-line","json_url":"https://alion.io/job/telefonica-tech-network-engineer-l3-3rd-line.json","meta":{"generated_at":"2026-09-27T00:41:52Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":619,"day_limit":5000,"remaining_today":4381,"minute_limit":60,"resets_at":"2026-09-28T00:00:00Z"}}}