Principal/Lead Systems Engineer (Security)

Leonardo UK Ltd; Southampton; Hybrid; GBP 55,000 - 90,000; Full time

Benefits offered by this job

Time to Recharge

Secure your Future

Your Wellbeing Matters

Rewarding Performance

Never Stop Learning

Refer a friend

Tailored Perks

Flexible working

Job summary

Leonardo UK in Southampton is seeking a Systems Engineer to design and develop security-related functionality for our airborne communications system. You will work across project teams, security functions, international partners and customers to solve real engineering problems and deliver secure, robust solutions.

The role focuses on requirements management, architecture feasibility, and documenting technical details, with hybrid working and a strong emphasis on teamwork and continuous learning.

Qualifications

• Experience in the development of military and/or civil communication systems.
• Experience in security protocols such as authentication and encryption.
• Ability to produce detailed technical reports.
• Graduate degree in relevant engineering, mathematics or related scientific discipline.

Responsibilities

• Management of system requirements.
• Feasibility studies to determine system architecture.
• Modelling of security functionality.
• Producing clear and concise technical documentation for your work.
• Support to the Project Engineering Lead to plan and develop work packages and subsequent reporting.
• Displaying good team working behaviours and taking responsibility to manage your own workload with the team.
• Engaging with customers and suppliers as necessary.

Skills

Security protocols

Technical reporting

Military/civil communications

Education

Graduate degree in engineering/science

Job description

Job Description

Your impact

Are you a Systems Engineer who loves contributing to the UKs Defence Industry and making impactful change? Leonardo has a fantastic opportunity for an Engineer to be responsible for the design and development of security related functionality required to support our next generation airborne communications system. This role will involve engaging with other areas of the project, the project security function, international partners and the customer. You will be working on real Engineering problems, designing and developing solutions that sit at the heart of our products.

What you'll do

• Management of system requirements.
• Feasibility studies to determine system architecture.
• Modelling of security functionality.
• Producing clear and concise technical documentation for your work.
• Support to the Project Engineering Lead to plan and develop work packages and subsequent reporting against these.
• Displaying good team working behaviours and taking a responsibility to manage your own work load in conjunction with the team
• Engaging with customers and suppliers as necessary

What you’ll bring

Required

• Experience in the development of military and/or civil communication systems.
• Experience in security protocols such as authentication and encryption
• Ability to produce detailed technical reports.
• Graduate degree in relevant engineering, mathematics or related scientific discipline.

Ideally

• Knowledge of embedded system development.
• Knowledge of firmware development.
• Knowledge of UK high grade requirements.

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

Successful candidates will be UK nationals. 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

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, 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.

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

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.

Where this vacancy is being recruited across more than one grade, the successful candidate will be appointed to a specific assessed grade, and the applicable salary range will be that associated with the grade of appointment.

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.

Primary Location: GB - Southampton

Contract Type: Permanent

Hybrid Working: Hybrid