Systems Engineers

ASSYSTEM; Reading; On-site; GBP 55,000 - 75,000; Full time

Job summary

An international engineering company in Reading is seeking 4 Senior Systems Engineers for a major Nuclear Defence project. This role involves delivering verification strategies and compliance analysis. Candidates should have at least 3 years of experience in the nuclear or defence sector, along with MBSE expertise. The successful individuals must also hold or be able to obtain DV Clearance. Join us to shape a reliable, green energy future.

Qualifications

• 3+ years of experience applying systems engineering in a nuclear or defence sector.
• Demonstrable experience of delivery and ownership within complex projects.
• Strong proficiency with MBSE tools.
• Experience engaging with both technical and non-technical colleagues.

Responsibilities

• Deliver updated verification strategies across all environments.
• Define claims and arguments to demonstrate compliance.
• Develop evidence roadmaps using integrated trials and modeling.
• Collaborate with stakeholders to shape strategies.
• Conduct clause-by-clause analysis of relevant standards.
• Ensure all evidence is traceable and logic linked.

Skills

Systems engineering

Model-Based Systems Engineering (MBSE)

Stakeholder collaboration

Verification strategies

Education

HNC/HND or degree in science or engineering

Tools

Sparx Enterprise Architect

IBM DOORS

Teamcenter / Product Lifecycle Management

Job description

Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 7,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low‑carbon energy.

We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.

Drawing on more than 55 years' experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimise the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked third in the world for nuclear engineering.

To ensure a viable, efficient, and reliable energy future for all

Job Description

📍 Location: Reading

🔒 Security Clearance Required: This role requires the successful candidates to hold (or be able to obtain) DV Clearance

💼 Contract Options: Outside IR35, Inside IR35, or staff

We are currently recruiting for 4 Senior Systems engineers to support our client on a major Nuclear Defence project in the Reading area to undertake a major systems verification exercise.

One of these 4 engineers will be an MBSE specialist.

Your Missions

• 📝 Deliver updated verification strategies across all environments and technical disciplines
• ✅ Define claims and arguments to demonstrate compliance with requirements
• 🔬 Develop evidence roadmaps using integrated trials and modelling across components, subsystems, and systems
• 🤝 Collaborate with stakeholders to shape strategies, fully logic‑linked via Model‑Based Systems Engineering (MBSE) and aligned with safety processes
• 📚 Conduct clause‑by‑clause analysis of relevant standards to identify required evidence
• 🔗 Ensure all evidence is traceable, logic linked, and mapped to specific compliance clauses

MBSE Specialist (x1)

• 👤 Lead and optimise MBSE model structure and deployment
• 🧩 Maintain consistency across users & teams
• 📊 Create engaging, accessible model visualisations
• 📝 Develop and integrate MBSE tools within the wider company framework
• 📈 Track and report performance metrics
• 🤝 Collaborate with business leaders, SMEs & technical experts

Qualifications

Candidate Profile (Skills, Experience & Qualifications):

• 🎯 3 years Experience applying systems engineering in a nuclear and/or defence sector
• 🎯 Demonstrable experience of delivery / ownership within complex projects
• 🎯 Experience engaging with and eliciting information from both technical and non‑technical colleagues.
• 🎯 HNC/HND or degree qualification in a science or engineering discipline
• 🎯 MBSE expertise using tools like Sparx Enterprise Architect & IBM DOORS
• 🎯 Experience inTeamcenter / Product Lifecycle Management (desirable)
• 🎯 Experience working with government agencies (desirable)

In addition to above theMBSE Specialistis expected to have:

• 🎯 A strong proficiency with MBSE tools (Enterprise Architect, etc.)

Additional Information

Security Clearance

🔒 This role requires the successful candidates to hold (or be able to obtain) DV Clearance

Due to the nature of work these roles will be delivering and for the protection of certain assets, the successful candidates have to be sole UK nationals

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.