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# Senior Systems Engineer

- **Company:** Expleo
- **Location:** Stevenage, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Data Analysis, Systems Engineering, Scrum Methodology, SC Clearance
- **Published:** October 24, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=e2e79bead34e6ec7

## About the Role

* 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.

Desired 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.

Experience:

 * 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.

What do I need before I apply:

 * 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.

## Description

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.
Responsibilities:

 * 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., 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