About this role
Salary: £48,000 - 88,000 per year
Requirements: We require UK Citizenship and current Baseline Personnel Security Standard (BPSS) clearance or higher.We are looking for strong hands-on experience with Cisco networking technologies, including Nexus switching, Cisco ISE, SD-WAN, and modern data centre networking solutions.We require experience supporting Cisco Nexus environments, including Leaf-Spine architectures, VXLAN, and EVPN technologies.We require experience administering Cisco NDFC or equivalent data centre network management platforms.We require experience supporting enterprise routing and switching technologies across large-scale environments.We require experience administering Palo Alto firewalls and enterprise network security solutions.We require experience supporting F5 BIG-IP load balancers and Microsoft Azure networking services.We require experience with network monitoring, traffic analysis, and packet capture tools.We require proven ability to diagnose and resolve complex issues across network, cloud, and security platforms.We require experience supporting resilience, business continuity, and disaster recovery initiatives.We need advanced knowledge of enterprise networking technologies, including BGP, OSPF, VLANs, VRFs, Spanning Tree Protocol, and link aggregation.We need a strong understanding of modern data centre networking concepts, including Leaf-Spine architectures, VXLAN, and EVPN.We need knowledge of VPN technologies, network access control, authentication, authorization, and network security principles.We need the ability to analyse network performance, identify root causes, and implement effective remediation strategies.We need strong understanding of operational best practices, including monitoring, patching, lifecycle management, documentation, and change control.We need excellent troubleshooting and analytical skills within complex enterprise environments.We need strong communication, documentation, and stakeholder engagement capabilities.We need the ability to work effectively within highly regulated and security-conscious environments.Preferred qualifications include Cisco certifications such as CCNP Enterprise or CCNP Data Center, or equivalent.Preferred qualifications include Palo Alto Networks certifications or significant operational experience.Preferred qualifications include F5 certification or extensive hands-on BIG-IP LTM administration experience.Preferred qualifications include Microsoft Azure networking certification or equivalent cloud networking expertise.Preferred qualifications include experience supporting Defence, Government, Aerospace, or other highly regulated environments.Preferred qualifications include experience with Cisco TrustSec, Security Group Tags (SGT), or identity-based network segmentation.Preferred qualifications include experience with Azure ExpressRoute, cloud interconnects, and colocation facilities.Preferred qualifications include experience with automation and scripting technologies such as Python, Ansible, or Terraform.Preferred qualifications include experience supporting global enterprise networks across multiple locations and telecommunications providers.Preferred qualifications include exposure to Secure Access Service Edge (SASE), advanced network security technologies, or application delivery solutions. Responsibilities: We configure, administer, and optimise complex Cisco networking environments, including Cisco Identity Services Engine (ISE), Cisco Nexus Dashboard Fabric Controller (NDFC), Nexus switching, Leaf-Spine architectures, VXLAN, EVPN, and SD-WAN technologies.We manage enterprise routing and switching services across data centres, office locations, cloud platforms, and remote access environments.We administer and support secure network services including Palo Alto firewalls, network segmentation, access control policies, and remote connectivity solutions.We manage F5 BIG-IP load balancing platforms, including virtual servers, pools, health monitors, certificates, and traffic management policies.We support Microsoft Azure networking services, including virtual networks, subnets, network security groups, route tables, gateways, and hybrid cloud connectivity.We troubleshoot and resolve complex infrastructure, networking, and application connectivity issues across multiple technology domains.We analyse packet captures, traffic flows, monitoring alerts, and platform telemetry to identify root causes and implement corrective actions.We perform network upgrades, software patching, hardware refresh activities, lifecycle management, and capacity planning.We monitor network availability, performance, and utilisation to ensure optimal service delivery and operational stability.We support backup, recovery, disaster recovery testing, high availability solutions, and operational resilience initiatives.We maintain network diagrams, configuration records, technical standards, and operational documentation.We participate in incident, problem, and change management activities to support reliable and secure service delivery.We collaborate closely with infrastructure, cybersecurity, cloud, application, and third-party support teams to maintain secure and resilient services. Technologies: AnsibleAzureCloudCiscoFabricHardwareSupportLoad BalancingNetworkNexusPythonSecurityTerraformVPN More:
KBR is seeking a Lead IT Network Administrator, Network, Voice and AV, to join our team supporting complex, mission-critical IT infrastructure across enterprise and secure environments. This is a permanent, full-time position based in Aldershot, Basingstoke, Salisbury, Southampton, or Swindon, with the role ultimately becoming part of our new Mission Technology Solutions company following the planned spin-out. Our Mission Technology Solutions business partners with governments and customers across defence, intelligence, space, aviation, and critical infrastructure to deliver high-end engineering, science, technology, and mission support solutions. This is an exciting opportunity to work with advanced networking, security, and collaboration technologies in a highly regulated environment and contribute to resilient, secure, high-performing services.
last updated 36 week of 2026