Assystem, Bristol, England, United Kingdom

Senior Process Engineer

Hybrid Senior Process Engineer role based in Bristol, with three days in the office and two from home.

About Assystem

At Assystem, our mission is to accelerate the global energy transition. With over 7,500 Switchers worldwide, we combine engineering expertise, project management, and digital innovation to deliver major infrastructure programmes. In the UK, we’re at the forefront of landmark projects including Hinkley Point C, Sizewell C, and future Small Modular Reactors (SMRs). By joining us, you’ll be contributing to some of the most exciting and important engineering challenges of our time.

Why Join the Community of Switchers?

At Assystem, you’ll be part of one of the top three largest nuclear engineering companies in the world. Working in a collaborative and supportive environment where innovation thrives. You’ll be empowered to grow your skills while contributing to cutting‑edge projects that have a lasting global impact.

Please note:

Due to project security requirements, visa sponsorship is not available for this position.

Job Mission

This hybrid Senior Process Engineer role is based in Bristol, with three days in the office and two from home. You will support the design and integration of effluent treatment systems, acting as a technical coordinator across multiple engineering disciplines. You will guide system engineers, support design decision making and ensure consistent integration of process, mechanical, civil, electrical, I&C and safety inputs.

Responsibilities

• Defining and cascading process engineering priorities aligned with key project milestones.
• Providing process engineering guidance to system engineers and resolving multidisciplinary issues.
• Coordinating closely with layout, civil, nuclear safety, electrical, I&C and commissioning teams.
• Tracking technical progress and escalating blockers to project and Responsible Designer teams.
• Leading and supporting team participation in technical committees and coordination forums.
• Promoting process design stability and challenging modifications before change initiation.
• Ensuring consistent integration of process impacts and updating system configuration data.

Qualifications

• Degree in Process or Mechanical Engineering, or equivalent.
• Background in nuclear, heavy industrial process, water treatment, chemical or energy sectors.
• Strong capability in process engineering decision making and system coordination.
• Excellent communication and interpersonal skills across UK and EU based teams.
• Confident working with remote and multidisciplinary engineering groups.
• Able to build constructive relationships across complex project structures.

Benefits

• 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.