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’re looking for an experienced Senior Power Systems Engineer to join our growing team, helping to design and develop electrical power systems for spacecraft. You’ll play a key part in how satellites and space vehicles generate, store, and distribute power — from early design all the way through to integration and testing.

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

Key Responsibilities:

• Design and develop power systems for spacecraft, from concept to final integration.
• Work on both high-level architecture and detailed electronic designs.
• Manage requirements and ensure designs meet all power and interface needs.
• Build and maintain power budgets and models for spacecraft missions.
• Support electrical integration and power system testing, ensuring reliable performance.
• Review electromagnetic compatibility (EMC) factors and propose solutions.
• Produce and maintain technical documentation throughout the project lifecycle.
• Work closely with other teams, suppliers, and project partners to ensure smooth system delivery.
• Help plan and conduct validation and verification activities for power systems.
• Support flight operations and help resolve any power-related issues during mission phases.

Required Skills:

• Mandatory: Previous experience working in the space industry (spacecraft, satellite, or launch vehicle projects).
• 5+ years of experience in power systems or electrical engineering, ideally in spacecraft or avionics design.
• Understanding of power conditioning, DC/DC converters, solar arrays, and battery management systems.

Required Qualifications:

• A Bachelor’s or Master’s degree in Electrical, Electronics, Power Systems, Aerospace Engineering, equivalent military experience or a related field 

Desirable Skills:

• Ability to produce and review technical documentation and engineering reports.
• Strong communication skills and the ability to work effectively with multidisciplinary teams.
• A proactive, hands-on approach to problem-solving and continuous improvement.

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.