Systems Engineer - Marine Systems in London

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive. Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities. People are our greatest asset, and we offer a competitive package to retain and attract the best talent. In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the Opportunity

Amentum is offering an exciting opportunity to join our growing team of professionals, working on a range of projects across the Defence sector. Our team is expanding, and we are seeking proactive and collaborative professionals at all levels to support the delivery of high-quality services to our clients. With deep technical, commercial, and strategic expertise, we develop solutions that address critical challenges, supporting digitalisation and security. We are looking for Marine Systems Engineers of various levels of experience working on submarine and surface vessel systems across the full engineering lifecycle. You will play a key role in shaping complex Defence platforms from concept through design and delivery, ensuring robust and coherent solutions that underpin mission‑critical capabilities. We have a network of base offices to work from in a hybrid model.

Key Responsibilities

• Elicit, analyse, and manage stakeholder and system requirements, ensuring traceability across the lifecycle.
• Develop system architectures and design artefacts, including functional, logical, and physical views.
• Support decomposition of requirements from system to subsystem and component levels.
• Collaborate with architects, developers, and integration teams to ensure coherent and feasible system designs.
• Support verification and validation planning, ensuring requirements are testable and aligned to acceptance criteria.
• Contribute to documentation and governance artefacts in line with MOD and industry standards.
• Examine key design drivers, standards and requirements.

Here’s What You’ll Need

• Degree qualification in Marine Engineering (or related subject such as Mechanical Engineering, Electrical Engineering etc) at either Bachelor’s or Master’s level;
• Be a Chartered Engineer, Incorporated Engineer, or show evidence of ongoing CPD towards Chartered status;
• Proven ability to solve complex marine systems engineering problems, including/such as trade‑off analysis and design trade studies.
• Experience in marine or naval systems engineering, ideally on warship or submarine design studies (especially surface combatants).
• Experience of working on naval ship studies and design activity during ship acquisition. Specifically, translating customer ideas and capability requirements, into design solutions and exploiting Defence Standards to shape/define design elements;
• Ability to work collaboratively within multi‑disciplinary teams and able to obtain a security clearance.

Experience

• Proven experience as a Marine Systems Engineer within Defence or complex system environments with a strong understanding of marine systems engineering principles and lifecycle models (e.g. V-model, Agile, hybrid approaches).
• Experience of working with stakeholders to determine their needs and generating the highest level of system requirements, based on the users’ needs and other constraints;
• Ability, experience and proof of producing high quality, well‑structured and logically written reports within tight timescales that clearly communicate an understanding of the task, the work carried out, conclusions and recommendations made to the sponsor;

Our Culture

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration. We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work. When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.