Principal Engineer - Systems Engineering (Requirements & Acceptance)

Job Title: Principal Engineer - Systems Engineering (Requirements and Acceptance)

Location: Barrow-In-Furness, Coventry or Filton

Salary: Negotiable depending on experience

Who we are:

Join BAE Systems and you’ll be part of something bigger. As a valued member of our global colleague network, you’ll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You’ll be trusted to play your part in delivering advanced, technology-led defence, aerospace and security solutions, shaping a safer future for all of us.

From the depths of the ocean to the far reaches of space, there’s no limit to where a career at BAE Systems could take you.

What you will be doing:

As a Principal Systems Engineer, you will lead the development, management and validation of system requirements across submarine programmes. You will be applying your systems engineering expertise to define, document and maintain requirements throughout the design lifecycle, while facilitating technical clarifications to impacted project teams. Opportunities within the role include supporting customer requirements development for the SSNA programme and managing challenging programme requirements within the DOORS requirements management database.

Core duties:

• You will be responsible for leading the Management of the Requirements Repository Database; either for the programme database, or your specific area
• Lead the capturing and analysing of stakeholder needs and requirements
• You will lead the development of good quality system requirements (and the way those requirements validate the stakeholder needs) in alignment with the acceptance criteria
• You will be responsible for ensuring that requirements and the supporting module remain under configuration control
• Support the development of estimates for the scope of work and resources required to deliver projects, enabling bids, proposal development and project planning activities from a process and governance perspective
• You will lead the capture and resolution of engineering issues and support with the maturation of processes applicable to your area
• Manage engagement with key senior stakeholders to enable the maturation of requirements and/or evolution of the database
• You will be providing technical guidance to other engineers and providing support to the engineering management team in planning and controlling specialist activities

Essential Skills:

• You will require significant knowledge and expertise in Requirements Management and facilitation alongside process and practices in the defence, maritime or closely linked industry
• A familiarity and understanding with DOORS Classic will be required
• You will need to have gained experience in the structure and collation of requirement Validation and Verification activities and engagement
• Knowledge of the engineering lifecycle with experience of operating in the phase relevant to the role and awareness of the entire engineering lifecycle
• You will require a strong understanding of related projects, products, programme, domain, discipline and functional teams within the Submarine enterprise, or equivalent external organisations

The SSNA Whole Boat Requirements & Acceptance Team:

Join us in the team where we are working at the forefront of one of the UK's most significant and complex defence programmes and playing a key role in shaping requirements is a unique opportunity to influence the future direction of a nationally important submarine programme, supporting the development of our future Submarine fleet.

The role offers excellent visibility, significant technical challenge and the opportunity to make a lasting impact on programme delivery and capability development. We offer relocation support packages across all Submarines roles, subject to meeting eligibility criteria.

A place where everyone can thrive:

We’re committed to building an inclusive workplace where everyone feels valued and supported. We welcome applications from all suitably qualified people and encourage discussion of reasonable adjustments where needed.

Please be aware that many roles at BAE Systems are subject to security and export control restrictions. Applicants must meet Baseline Personnel Security Standard, and many roles require higher levels of National Security Vetting, including 5–10 years continuous UK residency depending on the role.

Why BAE Systems?

Here you’ll build a career with purpose and limitless possibilities. Lifelong learning, meaningful work, and a supportive culture enable you to grow with confidence. You’ll be recognised for your contribution and supported with rewards that matter most to you.

Closing Date\: 28th October 2026

We reserve the right to close this vacancy early if we receive sufficient applications. If you are interested, please apply as early as possible.

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