Senior Network Engineer - L3

Job type:Perm
Salary/Rate:£50000 - £54145 per annum + see ad
Business Sector:Networks
Job ref:1212699
Post Date:November 13, 2023

Senior Network Engineer - 3rd Line


Permanent role offering up to £54,000.


Role overview:

We are seeking a dynamic and experienced Senior Network Support Engineer to join our team. As a key player in our mission, you will directly contribute to the support of operational secure networks, focusing on incident management and resolution for secure Military systems.


  • Provide Level 3 network engineering support for LAN and WAN across all security domains.
  • Manage and resolve incidents on clients' live systems, escalated from 1/2nd line resources in remote environments.
  • Take ownership of problems and incidents, delivering effective solutions.
  • Collaborate with Third Parties, Resolver Groups, NATO, and specified authorities to implement Service Changes and technical adjustments.
  • Update Design Documentation to accurately capture Network Changes.
  • Configure and manage network Cryptographic Items.
  • Provide detailed knowledge and expertise in core network technologies and infrastructure, including CISCO Nexus, AAA Management Platforms (e.g., ISE), QOS, NATO Gateways, routers, switches, firewall product lines, and more.
  • Actively participate in the maintenance, deployment, and configuration of (CISCO) Network Devices and supporting cabling and infrastructure.
  • Offer Level 3 support for LAN and WAN Core Services.
  • Provide network support, advice, and recommendations for design changes.
  • Ensure a detailed understanding of QOS, including Traffic Shaping, Policing, Scheduling/Congestion Management, and avoidance.
  • Contribute to the continuous improvement of the network through experience with routing protocols (OSPF, BGP), Spanning Tree, VoIP, and other relevant technologies.


  • Proven experience as a Level 3 Network Engineer, specializing in incident management and resolution on secure Military systems.
  • Industry certifications such as CCNP, CCIE, or equivalent.
  • Thorough knowledge of CISCO IOS XE, CISCO Switch and CUBE, Firewall IPS/IDS, ACL-ASA Firewall, and other core network technologies.
  • Excellent problem-solving skills and the ability to own and deliver solutions.
  • Strong communication and collaboration skills.

Your Benefits:

  • 25 days annual leave plus public holidays (3 flexible)
  • Pension - Double matching contributions of up to 10%
  • Life assurance
  • Companywide incentive plans
  • Flexible benefits, including increased holidays, travel, dental, critical illness, and more.
  • Perks at work - employee discounts
  • Employee assistance programme / virtual GP

What happens next?
To begin your application click APPLY NOW. Your CV will be forwarded to a CBSbutler representative. Should you be suitable they will be in touch within 5 working days.