EXPLEO is a world leader in missile systems design and manufacture. We pride ourselves on innovation, collaboration, and delivering cutting-edge solutions to meet the defence needs of our customers. As a Senior Systems Engineer, you'll play a key role in shaping the development of complex systems that ensure our ongoing success.

The Opportunity
As a Senior Systems Engineer at EXPLEO, you will take technical ownership of significant areas of complex projects, working across the full systems engineering lifecycle. This is a highly collaborative role that provides the opportunity to influence system architectures, guide design processes, and mentor junior engineers.

• Lead and contribute to the systems design and architecture of advanced systems, ensuring customer requirements are met.
• Deliver high-quality outputs across the full systems lifecycle, including requirements capture, system modelling, design, verification, and validation.
• Support trade-off studies and develop solutions to complex technical challenges.
• Lead and coordinate system-level analysis, integration, and testing activities.
• Interface with internal teams, customers, and suppliers to define system requirements and manage system-level decisions.
• Produce technical documentation, including system design descriptions, interface control documents, and test specifications.
• Provide mentorship and technical guidance to less experienced engineers.
• Drive continuous improvement, ensuring systems engineering best practices and processes are followed.

• Degree-qualified in a relevant discipline such as Systems Engineering, Aerospace Engineering, Electrical/Electronic Engineering, or Physics.

• Demonstrable experience in systems engineering within the defence, aerospace, or similar high-integrity industry.
• Strong understanding of systems engineering processes, methodologies, and tools (e.g., MBSE, SysML, DOORS).
• Experience across the full systems lifecycle, from concept development to validation and verification.
• Ability to perform trade-off studies and analyse system performance to meet technical, cost, and schedule constraints.
• Knowledge of complex system architectures, such as weapon systems, avionics, or missile systems.
• Effective communicator, able to work collaboratively across teams and disciplines.
• Experience with system modelling tools (e.g., MATLAB, Simulink, Rhapsody) is advantageous.
• Ability to work in a regulated environment with awareness of defence standards and safety-critical design.

• Due to the nature of the work at EXPLEO, applicants must be eligible for UK Security Clearance.

• Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges 
• We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects 
• Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses 
• Competitive company benefits
• Always working as one team, our people are not afraid to think big and challenge the status quo

#LI-BM1

• As a Disability Confident Committed Employer we have committed to:
• Ensure our recruitment process is inclusive and accessible
• Communicating and promoting vacancies
• Offering an interview to disabled people who meet the minimum criteria for the job
• Anticipating and providing reasonable adjustments as required
• Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people

“We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age”. 

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive