{"id":141681,"url":"https://alion.io/job/exponential-e-core-network-engineer","title":"Core Network Engineer","company":{"id":51505,"name":"Exponential-e","domain":"exponential-e.com","url":"https://alion.io/company/exponential-e","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":78,"open_postings":11,"ghost_share":0.364,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":41,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Networking","role_family":"Networking","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":52000,"max_usd":120000,"period":"year","method":"role_country_seniority_unknown","sample_n":27},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"ITIL","optional":false},{"name":"MPLS","optional":false},{"name":"OSPF","optional":false},{"name":"SLI/SLO/SLA","optional":false},{"name":"TCP/IP","optional":false},{"name":"Tcpdump","optional":false},{"name":"VPN","optional":false},{"name":"Wireshark","optional":false},{"name":"Assembly","optional":true},{"name":"FortiGate","optional":true},{"name":"Layer 2","optional":true}],"status":"live","first_seen_at":"2026-07-10T11:23:10Z","employer_posted_date":"2026-07-10","last_verified_at":"2026-10-17T05:04:52Z","board_verified":true,"closed_at":null,"days_open":98,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":98},"description":"Exponential-e\nFounded in 2002, Exponential-e swiftly established itself as a UK Cloud, Connectivity and Communications pioneer. Throughout our history, a focus upon leveraging leading-edge technology to deliver profitable and innovative services to our clients and prospects has resulted in industry and peer recognition for our ground-breaking approach, a truly world-class ICT services company.\nWe’re a company of innovators who think big and achieve bigger! Our people are crucial to the continuing success of our company. From our CEO to our new Graduates, each of our people demonstrates our PRIDE principles which are at the core of everything we do.\nOverall Purpose of the role:\nYour focus will predominantly be designing and implementing projects pertaining to the Core Network Infrastructure. You will be responsible for documenting the network design as well as providing a handover to your peers so that the solution can be maintained by the Operations team.\nYou will also be acting as an escalation point for incidents concerning core network infrastructure/services. You will be working closely with team members whilst providing mentoring where required for Core Network Operations engineers, as well as working with other internal teams.\nYour responsibilities will be a split between:\nProjects\nDocument and implement core network infrastructure\nCollaborate with cross-functional teams to deliver projects on time\nProvide a handover to your peers so that the infrastructure can be supported by the Operations team\nOperations\nTroubleshoot and resolve network issues within SLA\nAct as a senior escalation point for team members and internal teams for incidents, requests and changes following existing ITIL based processes and procedures.\nDue to the nature of the role you will be expected to fulfil some of your tasks out of hours and participate in the on-call rota for 24/7 support.\nKnowledge and experience required:\nExperience working with Service Provider networks\nGood understanding of networking protocols and technologies including:TCP/IP\nIS-IS, BGP, OSPF\nMPLS\nMP-BGP\nL2 & L3 VPN services\n\nGood troubleshooting ability including strong knowledge of network traffic analysing tools like Wireshark/TCPDump\nAbility to work independently and as part of a team\nDesirable knowledge and experience:\nLayer-2 / EVPN / VXLAN Data Centre networks, Leaf-Spine architectures\nExperience with BGP Peering, Transit\nKnowledge of F5 BIP-IP products, including Local Traffic Manager (LTM) and Global Traffic Manager (GTM), Application Security Manager (ASM)\nDDoS mitigation solutions\nExperience with the following vendors would be advantageous\nNokia 7450 & 7750\nF5 BIG-IP\nFortigate\nOur People\nOur people are what makes Exponential-e Group the company it is today. This year’s employee survey highlighted that 81% of employees who took the survey, would recommend a friend to work for our organisation.\nLearning and development are fundamental parts of daily life at Exponential-e. From their first day at the company, everyone is provided ample opportunities to develop their skills and broaden their horizons, with our own L&D team running a range of bespoke courses, based on the latest innovations and challenges across the digital landscape.\nExponential-e Group is committed to providing equal opportunities in employment and treating all employees with respect and dignity. The company respects and values the diversity of its staff, striving to maintain an environment where there is opportunity for everyone to feel valued, their talents to be utilised and for both personal and organisational aspirations to be met. 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