Mechanical Commissioning Engineer
Mechanical Commissioning Engineer

Mechanical Commissioning Engineer

Full-Time 36000 - 60000 £ / year (est.) No home office possible
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Assystem, Switch On

At a Glance

  • Tasks: Support commissioning of mechanical systems and equipment on-site at Hinkley Point C.
  • Company: Join Assystem, a leading nuclear engineering company driving the energy transition.
  • Benefits: Flexible hours, competitive pension, 25 days leave, and wellness support.
  • Other info: Collaborate with industry leaders and enjoy excellent career growth opportunities.
  • Why this job: Make a real impact on vital infrastructure projects and develop your engineering skills.
  • Qualifications: Degree in mechanical engineering and experience in regulated environments preferred.

The predicted salary is between 36000 - 60000 £ per year.

Assystem is committed to accelerating the global energy transition. With 8000 Switchers across the globe, we combine deep-rooted engineering expertise with digital innovation to help build a sustainable energy future. In the UK, we play a vital role in landmark projects such as Hinkley Point C, Sizewell C, and the development of SMRs, supporting the safe and efficient delivery of nuclear power infrastructure.

This is a full-time, site-based role at Hinkley Point C. We can only consider candidates within commutable distance of Bridgwater or those willing to relocate, with support available to assist the move. You will support the commissioning of mechanical equipment and systems. The role combines hands-on testing with structured preparation activities. You will develop practical commissioning capability in a highly regulated environment.

  • Support commissioning activities for mechanical plant and equipment
  • Assist with execution of mechanical testing and functional checks
  • Contribute to commissioning procedures and test documentation
  • Support fault identification and resolution during testing activities
  • Interface with construction, installation, and operations teams
  • Assist with system handover evidence and readiness documentation
  • Apply strong safety behaviours during all site activities

Required Skills and Qualifications:

  • Degree in mechanical engineering or related discipline
  • Understanding of mechanical systems and equipment
  • Practical site-based engineering or operational experience
  • Logical, methodical approach to problem solving
  • Experience in commissioning, testing, and equipment handover
  • Safety-focused mindset in industrial environments
  • Ability to work effectively within multi-disciplinary teams
  • Clear written and verbal communication skills

This role offers a rare balance of mechanical design involvement and site-based delivery on one of the UK’s most important infrastructure projects. If you want your engineering decisions to directly influence safe construction and long-term plant performance, this position offers genuine technical impact and long-term career value.

Benefits include:

  • Flexible working hours
  • Market Leading 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.

Mechanical Commissioning Engineer employer: Assystem, Switch On

Assystem is an exceptional employer, offering a unique opportunity to work on landmark nuclear projects like Hinkley Point C while being part of a mission-driven community dedicated to the global energy transition. With a strong focus on employee growth, flexible working hours, and a comprehensive benefits package including a market-leading pension scheme and professional development support, Assystem fosters a collaborative and inclusive work culture that values diverse perspectives and innovative solutions.
Assystem, Switch On

Contact Detail:

Assystem, Switch On Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Mechanical Commissioning Engineer

✨Tip Number 1

Network like a pro! Reach out to current or former employees at Assystem on LinkedIn. A friendly chat can give you insider info and maybe even a referral, which can really boost your chances.

✨Tip Number 2

Prepare for the interview by brushing up on your mechanical systems knowledge. Be ready to discuss how your experience aligns with the role, especially in regulated environments. We want to see your problem-solving skills in action!

✨Tip Number 3

Show off your safety mindset! During interviews, highlight your commitment to safety in industrial settings. Assystem values this highly, so make sure they know you take it seriously.

✨Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are proactive about joining our community of Switchers.

We think you need these skills to ace Mechanical Commissioning Engineer

Mechanical Engineering
Understanding of Mechanical Systems and Equipment
Practical Site-Based Engineering Experience
Commissioning Experience
Testing and Equipment Handover
Problem-Solving Skills
Safety-Focused Mindset
Ability to Work in Multi-Disciplinary Teams
Clear Written Communication Skills
Clear Verbal Communication Skills
Experience in Highly Regulated Environments
Logical and Methodical Approach

Some tips for your application 🫡

Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Mechanical Commissioning Engineer role. Highlight any relevant experience in regulated environments, as well as your understanding of mechanical systems.

Craft a Compelling Cover Letter: Use your cover letter to tell us why you're passionate about the energy transition and how your background makes you a great fit for Assystem. Be sure to mention any specific projects or experiences that relate to our work at Hinkley Point C.

Showcase Your Problem-Solving Skills: In your application, give examples of how you've tackled challenges in previous roles. We love candidates who can demonstrate a logical and methodical approach to problem-solving, especially in hands-on situations.

Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands and shows us you’re serious about joining our community of Switchers!

How to prepare for a job interview at Assystem, Switch On

✨Know Your Mechanical Stuff

Brush up on your mechanical engineering principles and be ready to discuss how they apply to commissioning activities. Familiarise yourself with common mechanical systems and equipment, as well as any relevant regulations in the nuclear sector.

✨Showcase Your Problem-Solving Skills

Prepare examples of how you've tackled challenges in a regulated environment. Be ready to explain your logical and methodical approach to problem-solving, especially in high-pressure situations like testing and fault identification.

✨Communicate Clearly

Practice articulating your thoughts clearly and concisely. Since you'll be interfacing with various teams, demonstrating strong verbal and written communication skills is crucial. Consider preparing a few key points about your past experiences that highlight your ability to collaborate effectively.

✨Safety First!

Emphasise your commitment to safety during the interview. Be prepared to discuss how you prioritise safety in your work and provide examples of how you've implemented safety measures in previous roles, particularly in site-based environments.

Mechanical Commissioning Engineer
Assystem, Switch On
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