Lead IT Network Administrator, Network, Voice, AV

Title:

KBR is seeking a Lead IT Network Administrator (Network Voice & AV) to join our team supporting complex mission critical IT infrastructure across enterprise and secure environments. This role is responsible for leading the administration optimisation and support of networking voice and audiovisual services ensuring high levels of performance security and availability across multiple sites. The successful candidate will bring strong expertise in Cisco networking technologies network security cloud connectivity and unified communications while serving as a key technical escalation point for operational support and infrastructure projects.

This is an exciting opportunity for an experienced IT professional to work with advanced networking security and collaboration technologies in a highly regulated environment. You will play a key role in maintaining resilient secure and high performing services driving continuous improvement initiatives and contributing to the delivery of critical business and operational outcomes across the organisation.

This is a permanent full-time position based in Aldershot Basingstoke Salisbury Southampton or Swindon. Only candidates with UK Citizenship and holding a BPSS or above should apply.

In September 2025 KBR announced that we are spinning our Mission Technology Solutions business into a separate public company. This role will ultimately be part of the new company. The Mission Technology Solutions business partners with governments and defense intelligence space aviation and critical infrastructure customers to deliver high-end engineering science technology and mission support solutions.

Key Responsibilities

• Configure administer and optimize 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 (Cisco Viptela and Meraki).
• Manage enterprise routing and switching services across data centres office locations cloud platforms and remote access environments.
• Administer and support secure network services including Palo Alto firewalls network segmentation access control policies and remote connectivity solutions.
• Manage F5 BIG-IP load balancing platforms including virtual servers pools health monitors certificates and traffic management policies.
• Support Microsoft Azure networking services including virtual networks subnets network security groups route tables gateways and hybrid cloud connectivity.
• Troubleshoot and resolve complex infrastructure networking and application connectivity issues across multiple technology domains.
• Analyse packet captures traffic flows monitoring alerts and platform telemetry to identify root causes and implement corrective actions.
• Perform network upgrades software patching hardware refresh activities lifecycle management and capacity planning.
• Monitor network availability performance and utilization to ensure optimal service delivery and operational stability.
• Support backup recovery disaster recovery testing high availability solutions and operational resilience initiatives.
• Maintain network diagrams configuration records technical standards and operational documentation.
• Participate in incident problem and change management activities to support reliable and secure service delivery.
• Collaborate closely with infrastructure cybersecurity cloud application and third party support teams to maintain secure and resilient services.

Basic Qualifications

Education & Experience

• UK Citizenship is required.
• Current Baseline Personnel Security Standard (BPSS) clearance or higher.
• Strong hands on experience with Cisco networking technologies including Nexus switching Cisco ISE SD-WAN and modern data centre networking solutions.
• Experience supporting Cisco Nexus environments including Leaf-Spine architectures VXLAN and EVPN technologies.
• Experience administering Cisco NDFC or equivalent data centre network management platforms.
• Experience supporting enterprise routing and switching technologies across large scale environments.
• Experience administering Palo Alto firewalls and enterprise network security solutions.
• Experience supporting F5 BIG-IP load balancers and Microsoft Azure networking services.
• Experience with network monitoring traffic analysis and packet capture tools.
• Proven ability to diagnose and resolve complex issues across network cloud and security platforms.
• Experience supporting resilience business continuity and disaster recovery initiatives.

Skills & Competencies

• Advanced knowledge of enterprise networking technologies including BGP OSPF VLANs VRFs Spanning Tree Protocol and link aggregation.
• Strong understanding of modern data centre networking concepts including Leaf-Spine architectures VXLAN and EVPN.
• Knowledge of VPN technologies network access control authentication authorization and network security principles.
• Ability to analyse network performance identify root causes and implement effective remediation strategies.
• Strong understanding of operational best practices including monitoring patching lifecycle management documentation and change control.
• Excellent troubleshooting and analytical skills within complex enterprise environments.
• Strong communication documentation and stakeholder engagement capabilities.
• Ability to work effectively within highly regulated and security conscious environments.

Preferred Qualifications

• Cisco certifications such as CCNP Enterprise CCNP Data Center or equivalent.
• Palo Alto Networks certifications or significant operational experience.
• F5 certification or extensive hands on BIG-IP LTM administration experience.
• Microsoft Azure networking certification or equivalent cloud networking expertise.
• Experience supporting Defence Government Aerospace or other highly regulated environments.
• Experience with Cisco TrustSec Security Group Tags (SGT) or identity based network segmentation.
• Experience with Azure ExpressRoute cloud interconnects and colocation facilities.
• Experience with automation and scripting technologies such as Python Ansible or Terraform.
• Experience supporting global enterprise networks across multiple locations and telecommunications providers.
• Exposure to Secure Access Service Edge (SASE) advanced network security technologies or application delivery solutions.