Senior Systems Engineer

Expleo is seeking an experienced Senior Systems Engineer to support advanced concept development activities within an Air Systems programme. Working as part of a multidisciplinary Future Systems team, the successful candidate will contribute to the development, assessment and maturation of next-generation effects optimisation concepts, supporting the evolution of future weapon and engagement capabilities.

The role requires a systems thinker capable of analysing complex operational problems, developing concept solutions, assessing capability interactions and producing structured engineering artefacts that support programme milestones and decision-making. The position also involves close collaboration with weapon programme teams, systems engineers, technical leads and programme stakeholders within an Agile delivery environment.

• →Develop and mature FCAS effects optimisation concepts to support future capability development activities.
• →Generate and document concept assumptions, constraints, dependencies and operational considerations.
• →Engage with weapon programme teams to understand current and future capability applications across a range of engagement scenarios.
• →Identify concept synergies, interactions and relationships between weapon systems and operational effects.
• →Produce functional architecture and behavioural diagrams to support concept assessment activities.
• →Generate and maintain combined concept functional diagrams and associated engineering artefacts.
• →Assess concepts and identify strengths, limitations, opportunities and dependencies.
• →Support weapon capability assessments against emerging FCAS concepts.
• →Produce concept artefacts and technical evidence to support programme Statements of Work, reviews and key milestones.
• →Provide technical expertise at programme reviews and stakeholder working groups.
• →Contribute to Agile project delivery activities including sprint planning, reviews and retrospectives.
• →Support project management activities through effective use of Agile toolsets and configuration-controlled environments.
• →Produce regular technical status updates and monthly progress reports for programme leadership.

• Systems engineering and concept development.
• Operational analysis and problem solving.
• Functional decomposition and systems modelling.
• Capability assessment and trade-off analysis.
• Stakeholder engagement and technical communication.
• Development of engineering artefacts, presentations and technical reports.
• Working within Agile project environments.
• Ability to work collaboratively across multiple engineering disciplines.
• Strong analytical and critical thinking skills.

• Future Combat Air Systems (FCAS) programme experience.
• Weapon systems and guided weapons knowledge.
• Concept of Operations (CONOPS) development.
• Model-Based Systems Engineering (MBSE) awareness.
• Defence architecture and capability modelling.
• Military operational effects analysis.
• Systems-of-systems engineering.

• Concept generation and concept maturation activities.
• Developing functional diagrams and engineering models.
• Analysing system behaviour, dependencies and operational interactions.
• Supporting technical reviews and milestone activities.
• Working with stakeholders to capture and refine technical requirements and assumptions.
• Operating within Agile delivery frameworks and collaborative engineering teams.

• Ability to work within a Defence environment and support sensitive programmes.
• Strong written and verbal communication skills.
• Ability to engage effectively with technical leaders, programme teams and key stakeholders.
• Eligibility to obtain and maintain appropriate UK Security Clearance where required.