Principal Networks Systems Engineer

Gb - Southamptonlead
Systems EngineerInfrastructure & Cloud
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Quick Summary

Key Responsibilities

· Practical experience of network implementatio

Technical Tools
Systems EngineerInfrastructure & Cloud

Do you want to grow your career in network engineering and work on projects that safeguard the UK’s national interests? At Leonardo, our Network Systems 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 meeting customer requirements. The role will involve a mixture of working from home and on site to ensure close collaboration with the wider team. When on site, this is an office- and integration laboratory-based role using network test equipment and a mix of commercial-off-the-shelf (COTS) and military-off-the-shelf (MOTS) IP network and virtual environment technologies.

The successful candidate would provide technical expertise within the Land and Naval domain of Leonardo UK with a focus on IP network and virtual environment technologies for, predominantly, communications systems on naval platforms.

The successful candidate will be working within an Integrated Project Team and be responsible to the Project System Design Authority for the design, configuration, implementation, documentation, test and verification of resilient network and server data architectures within some of the most demanding naval environments across the whole product lifecycle.

The successful candidate would be expected to work towards Design Authority status for IP networks and virtual environments, providing technical governance over a system’s design, ensuring it is fit for purpose, compliant, architecturally coherent and controlled throughout its lifecycle.

Once deployed, the day-to-day support of the networks is generally performed by the customer, with Leonardo UK providing spare equipment and design authority support (such as obsolescence management and approval of configuration changes). 

Key Responsibility Areas:

The successful candidate will work within the project engineering team and be responsible for:

·     Architecting, designing and governing current and future naval communication network solutions and their implementation.

·     Leading on network design including: production of high- and low-level network designs, development of logical and physical network architectures, definition of layer 2 and layer 3 architectures, production of routing, switching and segmentation strategies, allocation of communication services across network infrastructure.

·     All assigned systems engineering aspects of new and existing networks and network applications embodied on naval platforms working at all phases of the development lifecycle.

·     Defining network interfaces between communication systems, mission systems and other consumers.

·     Support to the capture of design and test artefacts as appropriate for all stages in the engineering lifecycle appropriate for managing existing systems and for taking concepts through to development.

·     Test definition, test execution and fault finding across IP networks and hosted systems.

·     Development of system installation and setting to work guidance.

·     Working closely with customers through the verification and validation stages of projects to ensure systems meet their requirements and needs.

Responsibilities

~1 min read

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) may apply, this could include meeting the eligibility requirements for The Security Check (SC) or Developed Vetting (DV). For more information and guidance please visit: https://careers.uk.leonardo.com/gb/en/security-and-vetting

What We Offer

~2 min read

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, or plan 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.
Permanent

Hybrid

Location & Eligibility

Where is the job
Gb - Southampton
On-site at the office
Who can apply
Same as job location

About this job

Posted
23 days ago
Employer
has 868 open jobs on Jobera.

Listing Details

Posted
September 22, 2026
First seen
October 4, 2026
Last seen
October 16, 2026

Posting Health

Days active
11
Repost count
0
Trust Level
14%
Scored at
October 16, 2026

Signal breakdown

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Principal Networks Systems Engineer