Senior Systems Engineer

Assystem UK Ltd; Bagstone; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Hybrid work: 1-2 days remote per week

Employee Committee & holiday bonuses

Ongoing training & career development

Internal promotions

Job summary

Assystem seeks a Senior Systems Engineer in Gloucestershire to lead technical projects within the Fusion and Modular Nuclear Business Unit. You will manage engineering interfaces and refine architectural frameworks, liaising with stakeholders to ensure cohesive design and timely delivery.

You will conduct optioneering and design risk assessments, advance MBSE approaches, and report progress with strategic resource recommendations to the Project Lead Engineer, Systems and Integration.

Responsibilities

• Coordinate creation of artefacts such as operations concepts, functional and system architectures, requirement and compliance statements, and verification and validation planning.
• Conduct optioneering assessments and design risk assessments (safety and CDM) to ensure robust project planning.
• Support integrated technical management by navigating technical and project risks, refining design configurations, and developing breakdown structures.
• Respond promptly to technical queries, ensuring clarity and swift resolution.
• Liaise with all disciplines to achieve unified design, applying cutting-edge systems engineering best practices to elevate team capabilities.
• Develop and propose innovative Model-Based Systems Engineering (MBSE) approaches for streamlined processes.
• Report progress on deliverables and provide strategic resource level recommendations to the Project Lead Engineer (Systems and Integration).

Job description

Senior Systems Engineer

2026-10-17T00:00:00

Location: Gloucestershire, Gloucestershire, GB, BS37 7NE

Contract Type: Any

Company: Assystem

Application Deadline: 2026-11-17T10:00:14.99

Company Description

Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements. Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.

Job Description

Join the Fusion and Modular Nuclear Business Unit! In this role, you'll lead technical projects by managing engineering interfaces, ensuring cohesive design integration, and refining architectural frameworks. You'll liaise with stakeholders, handle requirements, and support early-stage activities like optioneering and design concept development, collaborating closely with a dynamic project management team.

Your mission:

• Coordinate the creation of critical artefacts such as operations concepts, functional and system architectures, requirement and compliance statements, and verification and validation planning.
• Conduct optioneering assessments and design risk assessments (safety and CDM) to ensure robust project planning.
• Support integrated technical management by navigating technical and project risks, refining design configurations, and developing breakdown structures.
• Respond promptly to technical queries, ensuring clarity and swift resolution.
• Liaise seamlessly with all disciplines to achieve unified design, applying cutting-edge systems engineering best practices to elevate team capabilities.
• Develop and propose innovative Model-Based Systems Engineering (MBSE) approaches for streamlined processes.
• Report progress on deliverables and provide strategic resource level recommendations to the Project Lead Engineer (Systems and Integration).

Why Join the Community of Switchers?

• Over 55 years in nuclear engineering.
• Ranked among the top 3 largest nuclear engineering companies.
• Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
• Ongoing training with numerous career opportunities.
• 70% of our managers are promoted internally!
• Hybrid work: 1-2 days remote per week.

Qualifications

Coordinate the creation of critical artefacts such as operations concepts, functional and system architectures, requirement and compliance statements, and verification and validation planning.

Conduct optioneering assessments and design risk assessments (safety and CDM) to ensure robust project planning.

Support integrated technical management by navigating technical and project risks, refining design configurations, and developing breakdown structures.

Respond promptly to technical queries, ensuring clarity and swift resolution.

Liaise seamlessly with all disciplines to achieve unified design, applying cutting-edge systems engineering best practices to elevate team capabilities.

Develop and propose innovative Model-Based Systems Engineering (MBSE) approaches for streamlined processes.

Report progress on deliverables and provide strategic resource level recommendations to the Project Lead Engineer (Systems and Integration).

Additional Information

Due to the nature of the work, applicants must meet UK security clearance criteria.

Ready to make a difference in the nuclear engineering world? Join us and be a part of the future of nuclear and fusion innovation!

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people's ability to dare are the only things that matter! Bring your unique contributions and help us shape the future.

Summary

• Type: Full-time
• Function: Engineering
• Experience level: Mid-Senior Level
• Industry: Management Consulting