At Assystem, our mission is to accelerate the energy transition worldwide. With 7,500 Switchers across 12 countries, we combine engineering heritage with digital innovation to deliver safe, efficient and low-carbon infrastructure. Backed by over 55 years of experience in highly regulated sectors, we are currently ranked second in the world for nuclear engineering and support complex projects from design through to delivery.

Why Join the Community of Switchers?

Join one of the top three nuclear engineering companies in the world. As a Switcher, you’ll work on transformational missions across highly regulated sectors like nuclear. Your future team is at the heart of strategic change, delivering forward-thinking business architecture solutions that enable smarter, more efficient project and enterprise delivery.

Job Description

The Job Mission

This role drives high-impact business architecture across regulated, large-scale programmes.
You will guide and structure change aligned with strategic and operational goals.
Your future team ensures the seamless link between process, technology, and business value.

️ Lead stakeholder engagement to capture, assess and refine business requirements
️ Develop business cases, challenge assumptions, and identify strategic outcomes
️ Collaborate with partners to design best-in-class architecture solutions
️ Support acceptance and integration of new systems or process solutions
️ Govern the consistency of requirements through the full delivery lifecycle
️ Facilitate workshops and reviews across multiple business units and functions
️ Identify and implement continuous improvement across architecture domains
️ Contribute to RFI/ITT activities and support executive-level decision making

My profile

Experience delivering business architecture in regulated or complex environments
Proficient in business process analysis and modelling methods
Strong stakeholder management, influence and facilitation skills
Knowledge of licence conditions and regulatory IT implications (e.g. ONR/CNS)
Familiarity with IT system development and integration in critical industries
Skilled in developing investment cases and translating benefits into value
Experience using formal delivery methodologies (e.g. PRINCE2)
Strong communication and documentation skills, especially with senior leadership

️ TOGAF or Business Architecture certification
️ Experience working in nuclear or asset-intensive sectors
️ Understanding of engineering-business interface and strategic transformation
️ Familiarity with scoring models, RFI/ITT processes
️ Strategic thinking and problem-solving across multidisciplinary environments

Why You Should Apply

Shape transformative change in one of the most vital sectors of the UK’s low-carbon future. Join a strategic team driving business value through smart, compliant, and agile solutions across nuclear infrastructure programmes.

Benefits include:
Hybrid Working Opportunity
Pension scheme (8% company contribution / 4% personal contribution)
25 days’ paid annual leave + bank holidays + option to buy or sell days
Professional fees reimbursed
Flexible working hours
Employee referral scheme

Security clearance:

• Applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance, if not already security cleared to a minimum SC level.

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.

Are you a prospective or recent graduate?

Assystem offers you the opportunity to join our Switch to Grow UK Graduate Scheme, where you’ll gain hands on experience in engineering, digital services, and project management by working on some of the world’s most critical energy projects.

Be part of the challenge of the century; accelerating the switch to low carbon energy!