Senior Systems Engineer

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement and support sustainable transformation.

Our teams of passionate and agile engineers work on cutting‑edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

We are looking for a Senior Systems Engineer with hands‑on experience in spacecraft projects. You will support system design, analysis, and integration across multiple subsystems, ensuring spacecraft meet functional, performance, and mission requirements. You’ll work closely with multidisciplinary teams and help drive technical decisions across the program lifecycle.

• Location: London
• On Site: 1‑2 a month
• Clearance: SC
• Experience Level: Senior

• Plan and support technical activities across spacecraft programs.
• Manage system‑level elements such as functional models, modes, interfaces, and requirements.
• Conduct risk assessments, trade‑offs, and technical evaluations.
• Support subsystem and software design through multidisciplinary studies.
• Lead system assessments, baseline definitions, and budget planning.
• Contribute to configuration‑controlled engineering documentation.
• Support product implementation, integration, verification, and validation at system and flight levels.
• Help improve and iterate on company‑wide systems engineering processes.

• Space industry experience is mandatory.
• 8+ years in spacecraft system engineering.
• Experience with system requirements, trade studies, and spacecraft design.
• Familiar with spacecraft assembly, integration, testing, and operations.

• A Bachelor’s or Master’s degree in Engineering, or equivalent military experience in Aerospace, Engineering, Physics, or similar.

• Knowledge in at least three areas: avionics, power, propulsion, thermal/mechanical, control systems, or system testing.
• Strong organization and teamwork skills.
• Confident working with internal teams and customers.

We bring together entrepreneurial, tech‑driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

• A personalised career path and a rewarding management style
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Cycle & Tech Scheme
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings & team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes.

ALTEN is committed to fostering a diverse and inclusive workplace and values the strength that comes from a global mix of backgrounds and perspectives. We welcome applications from all suitably qualified candidates, regardless of background or protected characteristics under the Equality Act 2010. If you require any reasonable adjustments during the recruitment process, please let us know.

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website  If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected.

Details of this will be discussed with you at interview.