Senior Network Support Engineer

L3 Network Support Specialist (DV CLEARED)

• Rate: £500 per day inside IR35
• Location: Central London 
• Job Type: Contractor
• Mandatory: Must hold active DV Clearance  

We are seeking a Senior Cisco Network Engineer/Subject Matter Expert to join our team in London. This role is crucial for supporting customer deployable classified systems and contributing to our mission of making the world more sustainable through innovation. As a Network Support Engineer, you will play a key role in incident management and resolution on secure classified systems.

Day-to-day of the role:

• Provide Level 3 network engineering support for the LAN and WAN across all security domains.
• Primarily handle incident management on our clients’ live systems, focusing on incidents escalated from 1st and 2nd line resources.
• Install, configure, deploy, maintain, and diagnose all CISCO Network Devices and supporting cabling and infrastructure.
• Offer network support, advice, and recommendations for design changes.
• Liaise and work collaboratively with other third parties, resolver groups, and specified authorities to implement service and technical changes.
• Update design documentation to capture network changes.
• Configure and manage network cryptographic items.
• Ensure dependable and experienced support, taking ownership of problems and incidents to deliver solutions.

Required Skills & Qualifications:

• Extensive experience in installation, configuration, deployment, maintenance, and diagnostics of CISCO Network Devices.
• Proficient in Level 3 Support for LAN and WAN relating to Core Services.
• Detailed knowledge of core network technologies and infrastructure, including CISCO Nexus, AAA Management Platforms (e.g., ISE), and QOS.
• Advanced knowledge of routers, switches, and firewall product lines including CISCO IOS XE, CISCO Switch and CUBE, Firewall IPS/IDS, ACL-ASA Firewall, OSPF, BGP, Spanning Tree, VoIP.
• Experience with NATO Gateways is highly desirable.
• Must hold DV Clearance.