Senior 3rd-Line Network Engineer - Core Services

Leidos LLC

Farnborough

On-site

GBP 45,000 - 57,000

Full time

14 days+

Application generator

An application made for this job — a tailored resume and cover letter that speak straight to the posting.

Get past ATS filters

Benefits offered by this job

Contributory Pension Scheme

Private Medical Insurance

33 days Annual Leave (incl. holidays)

Flexible benefits

Flexi-Time

Job summary

Leidos UK is seeking a 3rd Line Network Engineer to sustain core network services in Farnborough. You will resolve complex incidents, support Problem Management, CSI, and handle change requests on IT systems supporting national security outputs.

You will work across SDN, Cisco LAN, WAN routing, and security-focused environments with hands-on experience on firewalls and VPN/virtual networks. This role includes operational shifts and KPI/SLA adherence.

Qualifications

Experience with SDN and NSX in enterprise networks.
Familiarity with Cisco Enterprise LAN environments and CCNP/CCDP level knowledge preferred.
Secure LAN design, security boundaries and rulesets.
Understanding of WAN connectivity and routing protocols in virtual/physical networks.
Hands-on with Layer 2/3 switching and routing.
Experience configuring/troubleshooting VPC, VDC, STP, BGP, OSPF.
Hands-on with Fortigate, SonicWall, Palo Alto, ForcePoint, ASAv, Juniper firewalls.
Strong communication, organisation and autonomous working.
Experience in ITIL ICT service delivery and incident handling under pressure.
Experience with patch management.

Responsibilities

System Support & Ticket resolution to keep Core Network estate online.
Root cause analysis with resolver groups and vendors.
Periodic maintenance with preventative activities.
Document changes and configurations; update SD+.
Assist in installation, configuration and deployment of infrastructure components.
Participate in projects and change requests through testing and implementation.