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 & 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!

Seeking a System Engineer to join our team in London to support a major spacecraft mission within the space sector. You will play a central role in defining, coordinating, and validating system‑level behaviour across multiple subsystems, ensuring the spacecraft meets its mission requirements with reliability and precision.

• Location:
  
  London
• On Site: 1-2x a month
• Clearance:
  Clearable
• Experience Level: Mid Level

• Lead system‑level requirements definition, flow‑down, and traceability across all spacecraft subsystems.
• Develop and maintain the system architecture, ensuring coherent interfaces between electrical, mechanical, RF, software, and payload domains.
• Produce and manage Interface Control Documents (ICDs), system specifications, and verification plans.
• Coordinate technical activities across multidisciplinary teams, ensuring alignment with mission‑level objectives.
• Support trade‑off analyses, design reviews, and system‑level decision‑making throughout the development lifecycle.
• Lead system‑level verification and validation, including functional testing, performance assessment, and compliance checks.
• Analyse subsystem interactions, identify risks, and drive mitigation strategies to ensure spacecraft reliability.

• Mandatory Space industry experience — direct involvement in spacecraft, satellite systems, or mission‑critical space hardware.
• Strong understanding of system engineering processes for complex aerospace platforms.
• Experience defining and managing system‑level requirements and interfaces.
• Ability to interpret subsystem documentation (electrical, mechanical, RF, software, payload).
• Experience with verification and validation activities at system level.
• Skilled in producing system documentation such as ICDs, specifications, and verification matrices.
• Strong analytical skills for trade studies, risk analysis, and system‑level problem solving.
• Ability to coordinate across multidisciplinary engineering teams.

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

• Knowledge of ECSS or similar space‑industry standards.
• Experience with model‑based systems engineering (MBSE) tools or methodologies.
• Familiarity with spacecraft AIT workflows and system‑level testing.
• Understanding of mission analysis, operations concepts, and spacecraft behaviour.
• Exposure to configuration control, change management, and system baselining.

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…