Junior Commissioning Process Engineer

️ About Assystem

Assystem is a global leader in engineering services, accelerating the energy transition through complex infrastructure programmes. In the UK, we support landmark nuclear projects including Hinkley Point C, Sizewell C and emerging SMR technologies. Our 7,500 Switchers combine deep engineering expertise with digital innovation to help deliver a net zero future. From design to commissioning, we are embedded in the full project lifecycle.

Why Join the Community of Switchers?

You'll be joining one of the top three nuclear engineering companies in the world. At Assystem, you'll be part of a collaborative and diverse team delivering some of the UK's most significant low-carbon infrastructure projects. Whether you're growing technically or expanding into new areas, your development is supported every step of the way.

Job Description

The Job Mission
This role supports the development of commissioning processes for a major nuclear power project.
You'll create and optimise end-to-end procedures for contractor commissioning activities.
You'll collaborate with internal and external stakeholders to align process and compliance.

Your key responsibilities will include:

• Help create and update process documents used across the commissioning phase
• Support development of clear procedures and instructions for project stakeholders
• Work with engineering and delivery teams to gather accurate process information
• Use tools like Visio and Excel to map out workflows and dependencies
• Ensure processes follow safety and regulatory expectations
• Assist with reviews and improvements to existing commissioning procedures
• Collaborate with stakeholders to gather feedback and identify improvements
• Support integration of processes across engineering, construction, and commissioning

My profile

Essential Skills and Qualifications

• HNC, apprenticeship, or degree in engineering or a related STEM subject
• Basic understanding of PFDs and P&IDs
• Comfortable using tools like MS Excel, Word, Visio, and PowerPoint
• Able to follow and document technical procedures clearly
• Strong attention to detail and good organisational skills
• Analytical mindset with a willingness to learn and improve processes
• Good communication skills and ability to work with different teams
• Eligible for UK security clearance
• Some experience in nuclear, commissioning, or other regulated sectors
• Awareness of health and safety regulations or quality processes
• Familiarity with document management or procedural frameworks
• Basic understanding of risk assessment or project lifecycle stages
• Interest in continuous improvement and process efficiency

Why Apply?
This is a great opportunity to grow your experience in a high-impact environment, supporting real-world engineering delivery at Hinkley Point C. You'll gain valuable exposure to commissioning, regulatory frameworks, and nuclear project delivery.

Benefits include:
Hybrid Working Opportunity
Flexible working hours
️ Pension scheme (8% company contribution / 4% personal contribution)
️ 25 days' paid annual leave + bank holidays + option to buy or sell days
Professional fees reimbursed
Employee referral scheme
Competitive Sick Pay - Support when you need it
Income Protection & 3x Salary Death-in-Service Cover
Free Digital Gym Access - Expert-led fitness classes
24/7 Employee Support Line - Mental health, financial & legal help

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!