Network Engineer NSX

Salary: £76,000 - 94,000 per year

Requirements:

• Strong experience in designing, configuring, and supporting network virtualisation platforms such as NSX or similar
• Ability to balance hands-on engineering with technical leadership and mentoring responsibilities
• Confidence to take ownership of solutions and represent networking in technical discussions
• Strong understanding of TCP/IP, the OSI model, and routing/switching protocols including BGP, OSPF, QoS, VPNs, and VLANs
• Experience with network virtualisation (NSX-T), including design, configuration, and support of NSX-based networking environments
• Experience with software-defined networking, including logical switching, routing, and micro-segmentation
• Experience integrating NSX networking within virtualised and platform environments such as VCF
• Hands-on experience with Cisco or equivalent multi-vendor network equipment
• Experience with network security technologies such as firewalls, IDS/IPS, VPN, and segmentation
• Familiarity with virtualisation and cloud networking concepts
• Experience with network monitoring, diagnostic, and analytics tools
• Understanding of ITIL and service management frameworks
• Experience delivering within secure, enterprise, or defence environments
• VMware NSX-T deep expertise and certification, or equivalent experience, is desirable
• Experience with VCF networking integration, including vSphere, vSAN, and Aria Suite, is desirable
• Knowledge of overlay and underlay network design concepts is desirable
• Experience automating network configuration using Ansible, Terraform, or APIs is desirable
• Experience integrating with security tooling such as SIEM or SOC platforms is desirable
• Experience with cloud networking, including AWS, Azure, and hybrid connectivity, is desirable
• Experience working in secure or regulated environments is desirable
• A good attitude and willingness to learn

Responsibilities:

• Design, configure, and support network virtualisation solutions such as VMware NSX within secure and enterprise environments
• Take ownership of engineering delivery for one or more work packages, including planning, estimation, execution, and reporting
• Develop and review high- and low-level network designs and technical documentation
• Integrate and test network components, ensuring compliance with performance and security requirements
• Provide mentoring, guidance, and technical leadership to Network Engineers and Technicians
• Collaborate with stakeholders, project teams, and customers to ensure solutions meet requirements
• Drive continuous improvement and contribute to engineering standards and governance
• Solve customer problems in an agile, innovative, and team-centric manner

Technologies:

• AWS
• Ansible
• Azure
• Cloud
• Cisco
• Support
• ITIL
• Network
• Security
• TCP/IP
• Terraform
• VPN
• VMware

More:

We are Leonardo UK, a global leader in Aerospace, Defence, and Security, with over 53,000 people worldwide and 8,500 across 9 UK sites. This Senior Network Engineer role is based at our Yeovil site, with a blended hybrid working model. We offer a comprehensive, company-funded benefits package including generous leave with up to 12 additional flexi-days, an award-winning pension scheme with up to 15% employer contribution, free mental health support and financial advice, employee networks supporting inclusion and diversity, a bonus scheme for management level and below, access to 4,000+ online courses through Coursera and LinkedIn Learning, a referral programme, flexible benefits worth up to 500 annually, and flexible working options. We are committed to building an inclusive, accessible, and welcoming workplace where our people help shape innovation, advance technology, and enhance global safety.

last updated 36 week of 2026