L3 Network Engineer - SC Clearance
Posted 6 days ago by 1754469830
£450 Per day
Inside
Onsite
Portsmouth
Summary: The L3 Network Engineer (CISCO) role requires an experienced professional with active SC Clearance to provide 3rd line network support for UK Military systems. This fully on-site position in Portsmouth involves incident resolution and system change implementation across LAN and WAN networks. The ideal candidate will have strong expertise in secure environments and hands-on experience with network devices. The role is suited for those who thrive in high-assurance environments.
Key Responsibilities:
- Provide 3rd line support for LAN and WAN environments
- Manage escalated incidents from 1st and 2nd line teams
- Implement approved changes to live systems
- Install, configure, maintain and troubleshoot routers, switches, firewalls and related cabling infrastructure
- Perform IOS and firmware upgrades on network devices
- Update and maintain network design documentation
- Offer network advice and input to design changes
- Support operations in multi-security tier and multi-tenant environments
Key Skills:
- Strong experience in 3rd line network support
- Configuration and troubleshooting of CISCO devices
- ASA and Firepower firewall experience
- Familiarity with VMware NSX Firewall and SDWAN
- Understanding of NGNIX and Linux systems
- Experience in multi-tenant and high-security networks
Salary (Rate): £450 per day
City: Portsmouth
Country: United Kingdom
Working Arrangements: on-site
IR35 Status: inside IR35
Seniority Level: Mid-Level
Industry: IT
L3 Network Engineer (CISCO) - Must have an active SC Clearance
An opportunity is available for an experienced L3 Network Engineer (CISCO) to join a committed team supporting UK Military systems. This is a fully on-site role in Portsmouth and requires strong 3rd line network support expertise, particularly in secure environments. You will work on incident resolution and system change implementation across LAN and WAN networks.
Key Responsibilities
Provide 3rd line support for LAN and WAN environments
Manage escalated incidents from 1st and 2nd line teams
Implement approved changes to live systems
Install, configure, maintain and troubleshoot routers, switches, firewalls and related cabling infrastructure
Perform IOS and firmware upgrades on network devices
Update and maintain network design documentation
Offer network advice and input to design changes
Support operations in multi-security tier and multi-tenant environments
Mandatory Skills
Strong experience in 3rd line network support
Configuration and troubleshooting of CISCO devices
ASA and Firepower firewall experience
Familiarity with VMware NSX Firewall and SDWAN
Understanding of NGNIX and Linux systems
Experience in multi-tenant and high-security networks
Desirable Skills
Documentation of network changes and design updates
Effective collaboration with cross-functional teams
Experience supporting defence or military environments
This role is suited to an experienced and security-cleared network engineer who enjoys hands-on support in high-assurance environments.