Principal Security Consultant in Somerset

Your Impact

Leonardo UK is seeking a proven and experienced Principal Consultant to join the Cyber & Security Solutions Division team. This role is focused on the delivery of one of the company’s core products to an existing customer. This role will lead a team that will oversee, co-ordinate and deliver all facets of cyber and information security related to the delivery across an engineering lifecycle – from requirements all the way through to in-service support and maintenance. This is an exciting opportunity at the very beginning of a significant programme, during which you will ensure that the product and associated deliverables are as secure as reasonably practicable, and in accordance with customer’s requirements and risk appetite. You will be supported in this role as part of a larger consulting team, engineers and product domain specialists. Your work at Leonardo UK will see you take the lead in solving customer problems in an agile, innovative and team-centric manner. This role is based full-time at our Yeovil site.

What you'll do as a Principal Consultant

• Contribute to or lead a team to meet all aspects of the cyber and information security delivery across an engineering lifecycle.
• Interpret customer requirements into actionable security management plans, statements of work, and activities to be delivered across the lifecycle.
• Become a lead security subject matter expert for the product being delivered.
• Oversee and deliver associated statements of work and artefacts to time, cost and quality constraints.
• Identify, manage and escalate technical and delivery risks and issues.
• Manage the customer relationships for the cyber and information security workstream, both internal and external.
• Line manage and mentor consultants within your team as required.

What you'll bring

In addition to a passion for cyber and information security, ideally you need to have:

• Skills
• Ability to work independently without supervision and be able make sound decisions based on the facts available at the time.
• Excellent written and verbal communication skills at all levels, both internally and with customers.
• Core consulting skills – building client relations; adaptability to changing schedules; reliability and quality of task delivery; flexibility in working hours and locations; team player.
• Managing risks and services in accordance with customer, regulatory and legislative expectations.
• Qualifications
• A degree and/or master’s degree in cyber security and/or a systems or software engineering discipline – or relevant comparable experience.
• At least two recognised professional cyber security certifications such as CISSP, CISM, CASP/SecurityX and/or Chartership or comparable in a security related discipline (ChCSP).
• Knowledge and Demonstratable Experience
• In the application of Defence security standards, such as Def Stan 05-138 & Def Stan 05-139.
• Of MOD accreditation and secure by design processes (ISN2023/09), and associated policies, practices and deliverables across the lifecycle.
• In the application of standards including NIST Special Publications (e.g. SP 800-30, 37 & 53), and/or RTCA-DO-326A/B, 355A & 356A.
• That extends outside of traditional enterprise IT scenarios extending to proprietary and open-source software, firmware and electronic hardware.
• Developing, evaluating and analysing design constraints, and detailed system and security designs as they pertain to the cyber domain.
• Decomposing cyber and security requirements down to the system control level.
• Conducting cyber and information security risk assessment activities including threat modelling, vulnerability analysis and analysis of mitigations, including technical understanding.
• Scoping and managing security verification and validation activities and remedial action plans.
• Coordinating with product engineers, system architects, and developers to provide oversight and guidance in the development of robust solutions, including advising on suitable product or platform lockdown and configurations.
• Nice if you had:
• Excellent understanding of the engineering lifecycle and key gate review activities.
• Knowledge of current Crypto technologies, Key Management Systems & practical COMSEC implementations and MOD / NCSC standards.
• Knowledge or experience of ARP4754A/ARP4761 and its interrelationship with security.

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) 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: 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.

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!

Primary Location: GB - Yeovil - Lysander Rd

Contract Type: Permanent

Hybrid Working: Hybrid

Job Summary

Job number: R0032106

Date posted: 2026-08-10

Profession: Cyber

Employment type: Full time