L3 Network Engineer

The L3 Network Engineer will cover management maintenance and support of network infrastructure perimeter security systems and network management platforms.Key Responsibilities:Remote and onsite support (where required) of network and security infrastructure (LAN / WAN / WLAN / Firewalls / Application/VPN Delivery Controllers etc.)Troubleshooting complex network issues identifying network bottlenecks and implementing solutions to ensure optimal network performanceOptimizing network infrastructure to ensure maximum performance and scalability.Maintain accurate network documentation including network diagrams configurations and inventory recordsPrepare regular reports on network performance availability and securityDay-to-day patching maintenance and operation of the above in secure environmentsContinual improvement of the systems based on changing demandsLiaising with various departments within the businessCoordinating with 3rd party suppliers and partners to support maintain and implement these systemsIn 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.Qualifications : Skills & Experience:Essential;Extensive experience of enterprise LAN/WAN/WLAN managementExtensive experience of Cisco HPE Aruba Meraki and/or Juniper switching/wirelessExtensive experience of firewall technologies particularly Fortinet Cisco Meraki and/or Palo AltoExtensive experience of network monitoring troubleshooting and management toolsCCNP certificationDesirable;VMware NSX experienceFortinet certificationPalo Alto certificationInterpersonal Skills;Articulate and a clear communicatorBe a customer advocateHave the ability to converse technical terms and definitions to non-technical personnelExperience in report writingMeticulous with excellent attention to detailInterested in Continual Service ImprovementAble to multitask and handle large amounts of complex informationAdditional Information : Must have the right to live and work in the UK. Due to our location access to own transport is essential.Must meet Security Clearance vetting requirements as this is a requirement of the role.Any offer would be conditional upon the successful candidate passing a full SC and NPPV3 vetting process.Key Words:Network Engineer - CCNP - Fortinet - Fortigate - Firewalls - Network Analyst - Networking - Cisco - Virtual Networking - Data Centre - Data Center - Palo Alto - Maraki - NSX - HPE - ArubaAt 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. Be yourself with us and feel that you belong. We 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.  We are also committed to equity accessible hiring practices and creating an inclusive culture through many means including TogetHer (Womens network) and our Employee Resource Groups which include Diversity and Inclusion Telefónica Tech Pride Neurodiversity ELEVATE (African and Caribbean heritage network) and Sustainability.  We dont believe hiring is a tick box exercise so if you feel that you dont match the job description 100% but would still be a great fit for role please get in touch. Remote Work : YesEmployment Type : Full-time Key Skills Load Balancing,Routing Protocols,Network Administration,Network Engineering,BGP,LAN,Computer Networking,IPsec,OSPF,Cisco ASA,Juniper,MPLS Experience: years Vacancy: 1