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 & 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 

Key Responsibilities:

• 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.

Required Skills:

• 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.

Required Qualifications:

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

Desirable Skills:

• 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.

Why join us? 

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.

In short you get: 

• 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. 

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 Gov.UK. 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.