{"id":3747487,"url":"https://alion.io/job/pasiona-senior-l3-network-engineer","title":"Senior L3 Network Engineer","company":{"id":2688484,"name":"Pasiona","domain":"pasiona.com","url":"https://alion.io/company/pasiona","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Personio","truth_index":{"grade":"B","score":80,"open_postings":6,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":21,"computed_at":"2026-11-05T05:54:30Z"}},"role":"Networking","role_family":"Networking","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barcelona, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"BGP","optional":false},{"name":"GCP","optional":false},{"name":"Hyper-V","optional":false},{"name":"MPLS","optional":false},{"name":"Nagios","optional":false},{"name":"OSPF","optional":false},{"name":"Python","optional":false},{"name":"TCP/IP","optional":false},{"name":"VMWare","optional":false},{"name":"VPN","optional":false}],"status":"live","first_seen_at":"2026-11-04T12:23:19Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-05T15:04:44Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Descripción del puesto / Funciones\nProvide advanced (Level 3) support, troubleshooting, fault isolation, and optimization for enterprise network infrastructure.\n\nLead network incident resolution and perform detailed root-cause analysis for major outages.\n\nMaintain, support, and participate in network architecture design reviews, upgrades, and security implementations.\n\nAutomate routine network tasks and enhance monitoring processes using scripting and automation tools.\n\nDevelop and maintain accurate network configurations, incident reports, and technical architecture documentation.\n\nParticipate in an on-call rotation (up to 1 week per month, running Tuesday to Tuesday, including weekends).\n\nCollaborate with cross-functional teams to drive network projects, migrations, and infrastructure enhancements.\n\nRequisitos mínimos\nExperience: Minimum of 8 years in network engineering within enterprise or service provider environments, including hands-on experience designing, deploying, and maintaining complex network infrastructures.\n\nEducation: Bachelor’s degree in Computer Science, Telecommunications, or a related field.\n\nCore Technical Expertise:\nDeep knowledge of routing and switching protocols: TCP/IP, BGP, OSPF, EIGRP, and MPLS.\n\nHands-on experience with enterprise-grade networking and security equipment (Cisco, Palo Alto, Aruba, Juniper).\n\nStrong expertise in VPN technologies, firewall configurations, and network security appliances.\n\nProficiency with network monitoring and management tools (SolarWinds, PRTG, Nagios, Cisco Catalyst Center / DNAC, Cisco ISE).\n\nSkills & Competencies:\nStrong analytical, problem-solving, and advanced fault-isolation capabilities.\n\nExcellent verbal and written communication skills with the ability to explain complex technical issues to diverse stakeholders.\n\nAbility to work independently with strong ownership, adapt to fast-paced environments, and handle pressure effectively.\n\nRequisitos valorables\nCertifications: Professional or expert-level certifications such as Cisco CCNP/CCIE, Palo Alto PCNSE, or equivalent.\n\nAutomation & Software: Knowledge of Software-Defined Networking (SDN), NFV, and automation scripting (Python, Ansible).\n\nCloud & Virtualization: Cloud networking experience (AWS, Azure, GCP) and data center virtualization (VMware, Hyper-V).\n\nAdditional Systems: Familiarity with VoIP/Unified Communications systems and network architecture design tools.\n\nIdiomas\nEnglish is a mustUbicación\nBarcelona","description_format":"text","description_chars":2474,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Custom Software 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