Senior Systems Engineer in Hampshire, Portsmouth

Location: Portsmouth Broad Oak

We offer a range of hybrid and flexible working arrangements – please speak to your recruiter about the options for this particular role.

Salary: Up to £60,000 (dependent on skills and 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 the advanced, technology-led defence, aerospace and security solutions of tomorrow, 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.

Role description: As a Senior Systems Engineer, you will apply Systems Engineering principles across the full engineering lifecycle, from requirements definition through design, integration, verification, customer acceptance, in-service support, and system disposal. You will leverage your expertise to develop system and sub-system level solutions that meet stakeholder needs and regulatory requirements. The role involves resolving complex engineering challenges, providing technical leadership, and ensuring successful system integration and delivery. Working collaboratively within multidisciplinary teams, you will drive coherent system design, support risk management, and contribute to continuous improvement, ensuring high-quality, efficient, and compliant engineering outcomes across a range of project scenarios.

Core Duties:

• Apply Systems Engineering Principles: Implement ISO 15288 across the full lifecycle—from requirements definition through integration, acceptance, support, and disposal
• Requirements Management: Decomposing and managing system and sub-system requirements using approved tools (e.g., IBM DOORS Next)
• System Architecture & Design: Performing system design decomposition, interface definition, and maintain architectural models in tools like CATIA Magic (Cameo)
• Integration & Testing: Planning and executing system integration and testing, contributing to acceptance strategies and compliance verification
• Technical Documentation & Reviews: Producing technical reports, presentations, and conducting reviews to ensure adherence to specifications and standards
• Technical Leadership & Guidance: Working independently under limited direction, resolving engineering issues, and providing guidance to the immediate team
• Maintain Contemporary Practices: Staying current with Model-Based Engineering, digital threads, cybersecurity, and safety procedures

Essential Skills:

• You’ll demonstrate an understanding of engineering principles and approaches underpinning design and development activities and be capable of systems thinking, applying holistic approaches to complex problems
• You’ll demonstrate understanding, knowledge and experience of Systems Engineering with a focus on software-based product development, including knowledge of appropriate Systems Engineering and Software Engineering standards (e.g. ISO 15288 and ISO 12207 respectively)
• You’ll have experience of working with large scale complex system designs
• You’ll have experience of multiple phases of an engineering lifecycle and good knowledge of lifecycle models (e.g. Waterfall, Agile) and associated tools (e.g. JIRA)
• You’ll be able to present both technical and non-technical information in a formal setting

Benefits: As well as a competitive pension scheme, BAE Systems also offers employee share plans, an extensive range of flexible discounted health, wellbeing and lifestyle benefits, including a green car scheme, private health plans and shopping discounts – you may also be eligible for an annual incentive.

The Modelling & Simulation Projects team: We’re a team of around 150 training and systems engineering specialists with decades of experience delivering world-class naval training solutions for the Royal Navy. Our diverse workforce includes former RN officers, operators, and maintainers, alongside experts from the Army, RAF, MOD, academia, and industry. We shape training strategy, define requirements, and assure solutions that meet operational needs. We deliver end-to-end training management and technology solutions across the Defence training continuum, aligned with JSP 822 and JSP 939. From strategy and acquisition to integration and assurance, our products support training delivery, experimentation, and test & integration.

Why BAE Systems? Here you’ll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You’ll be recognised for your contribution and enjoy rewards tailored to what’s most important to you and your family, support for your financial and personal wellbeing, as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and proud of the difference you make.

A place where everyone can thrive: We’re committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do.

Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

Closing Date: 1st June 2026. We reserve the right to close this vacancy early if we receive sufficient applications for the role. Therefore, if you are interested, please submit your application as early as possible.