Network Engineer - SC Clearance

• Design, implement, and support enterprise network infrastructure across physical and virtual environments
• Configure and manage routers, switches, and firewalls
• Deliver network architectures, including Leaf-Spine networks, software-defined networking, and virtualised networking platforms
• Configure, maintain, and troubleshoot dynamic routing protocols, including OSPF and BGP
• Implement and support core network services, including IP addressing, subnetting, VLANs, QoS, and traffic management
• Deploy and manage overlay networking technologies such as VXLAN
• Implement secure networking solutions, including firewall policies, IDS/IPS technologies, and secure communications
• Support network integration, testing, validation, and commissioning activities
• Produce and maintain technical documentation, including Low-Level Designs, network build guides, configuration standards, and operational runbooks
• Work with Service Management teams to troubleshoot, investigate, and resolve incidents and service issues
• Conduct root cause analysis and recommend improvements to increase service stability
• Contribute to automation, standardisation, and continuous improvement across the network estate
• Ensure solutions align with programme standards, governance requirements, and security policies

Technologies:

• Atlassian
• Cloud
• Cisco
• Confluence
• Firewall
• Support
• JIRA
• Network
• Nexus
• Security
• TCP/IP
• VMware
• iOS, We are seeking an experienced Network Engineer for a high-profile programme delivering critical infrastructure capabilities in a secure, complex technical environment. The role supports enterprise-scale, mission-critical systems and services throughout the project lifecycle, from design and build through integration, testing, and operational support. This is an opportunity to deliver resilient networking solutions in a highly regulated environment. The position is based in the UK, with hybrid working and on-site attendance as required. The rate is up to £675 per day via an approved umbrella company.

• Strong experience in enterprise network engineering, including design, implementation, administration, and troubleshooting
• Excellent understanding of IP networking fundamentals, including TCP/IP, subnetting, routing, and address management
• Hands-on experience configuring and supporting routing protocols, particularly OSPF and BGP
• Advanced knowledge of enterprise networking equipment, including routers, switches, and firewalls
• Experience with enterprise networking technologies such as Cisco Nexus, Cisco IOS-XE, Leaf-Spine architectures, and VXLAN
• Strong understanding of network security technologies, including firewalls, IDS/IPS, AAA platforms, and secure network segmentation
• Experience implementing and managing QoS policies and traffic optimisation techniques
• Ability to produce and maintain technical documentation, including LLDs, build guides, and operational procedures
• Strong analytical and troubleshooting skills with a methodical approach to problem solving
• Excellent communication and stakeholder management skills
• Relevant industry certification such as CCNP Enterprise or an equivalent networking certification
• Must hold or be eligible to obtain UK Security Clearance (SC)
• Advantageous: Experience in Defence, Government, National Security, or other highly regulated environments; knowledge of defence-grade networks and secure gateway architectures; experience supporting large-scale, virtualised, or software-defined infrastructure; familiarity with Agile delivery methodologies and Atlassian tools such as JIRA and Confluence; experience designing and managing secure multi-tenanted network architectures; exposure to networking automation and infrastructure-as-code; additional certifications such as CCIE, VMware VCP-NV, or Chartered Engineer (CEng); knowledge of cloud networking and hybrid infrastructure