Network Engineer - NSX

Job Description:

Salary Range: £44,171 - £58,000

Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external market. Exceptions above the standard range are managed through governance controls to protect internal equity.

Your impact

Do you want to grow your career in network engineering and work on projects that safeguard the UK’s most critical systems? At Leonardo, our Network Engineers are at the heart of designing, configuring, and supporting secure networks that keep our customers connected and protected.

Your work at Leonardo UK will see you take the lead in solving customer problems in an agile, innovative and team-centric manner. The role may involve a blended hybrid working model, with a mixture of working from home and working on site at one of our Leonardo offices to ensure close collaboration with the wider team and with our customers.

What youwilldo as a Senior Network Engineer

• Design, configure, and support network virtualisation solutions (e.g. 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.

Whatyou’llbring

• Strong experience in designing, configuring, and supporting network virtualisation platforms (e.g. 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.

Coreareas(must have):

• Strong understanding of TCP/IP, OSI model, and routing/switching protocols (BGP, OSPF, QoS, VPNs, VLANs)

• Network virtualisation (NSX-T): design, configuration, and support of NSX-based networking environments

• Software-defined networking: implementation of logical switching, routing, and micro-segmentation

• Integration of NSX networking within virtualised and platform environments (e.g. VCF)

• Hands-on experience with Cisco or equivalent multi-vendor network equipment

• Network security technologies (firewalls, IDS/IPS, VPN, segmentation)

• Familiarity with virtualisation and cloud networking concepts

• Network monitoring, diagnostic, and analytics tools

• Understanding of ITIL and service management frameworks

• Delivery within secure / enterprise / defence environments

Desirable:

• VMware NSX-T deep expertise and certification (or equivalent experience)

• VCF networking integration (vSphere,vSAN, Aria Suite)

• Overlay / underlay network design concepts

• Automation of network configuration (Ansible, Terraform, APIs)

• Integration with security tooling (SIEM, SOC platforms)

• Cloud networking (AWS, Azure) and hybrid connectivity

• Experience working in secure or regulated environments

This is not an exhaustive list, and we are keen to hear from you even if you might not have experience in all the above. The most important skill is a good attitude and willingness to learn.

Security Clearance

This role is subject to pre-employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) will apply. This role requires Developed Vetting (DV) clearance prior to starting.Formore information and guidance please visit:https://careers.uk.leonardo.com/gb/en/security-and-vetting

Location

This rolewillbe based at one of our UKsites -Yeovil.

Why join us

At Leonardo, our people are at the heart of everything we do. We offer a comprehensive, company-funded benefits package that supports your wellbeing, career development, and work-life balance. Whether you're looking to grow professionally, care for your health, orplan for the future, we’re here to help you thrive.

• Time to Recharge: Enjoy generous leave with the opportunity to accrue up to 12 additional flexi-days each year.

• Secure your Future: Benefit from our award-winning pension scheme with up to 15% employer contribution.

• Your Wellbeing Matters: Free access to mental health support, financial advice, and employee-led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity).

• Rewarding Performance: All employees at management level and below are eligible for our bonus scheme.

• Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning.

• Refer a friend: Receive a financial reward through our referral programme.

• Tailored Perks: Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more.

• Flexible working: Flexible hours with hybrid working options. For part time opportunities, please talk to us about what might be possible for this role.

For a full list of our company benefits please visit our website.

Leonardo is a global leader in Aerospace, Defence, and Security. Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. Our employees are not just part of a team-they are key contributors to shaping innovation, advancing technology, and enhancing global safety.

At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace. We believe that a diverse workforce sparks creativity, drives innovation, and leads to better outcomes for our people and our customers. If you have any accessibility requirements to support you during the recruitment process, just let us know.

Be part of something bigger - apply now!

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