Mechanical Design Engineer – Nuclear

AtkinsRéalis; Sheffield; On-site; GBP 80,000 - 100,000; Full time

Job summary

A global consultancy company in Sheffield is seeking a Mechanical Design Engineer to tackle critical problems in the energy sector. The ideal candidate will engage in complex projects related to nuclear and renewable energy systems, ensuring the delivery of innovative mechanical solutions. You should be a degree-qualified mechanical engineer with proven experience in project management and stakeholder engagement. This role offers a unique opportunity to contribute to sustainable energy solutions while advancing your career in a supportive environment.

Benefits

Flexible holidays

Health & wellbeing benefits

Career development support

Qualifications

• Degree qualified mechanical engineer (or relevant qualification).
• Experience in requirements capture, including functional, non-functional, stakeholder, and regulatory requirements.
• Experience in generating design solutions via formal optioneering or similar processes.
• Experience in mechanical engineering substantiation for new designs or existing plant.
• Experience in writing detailed technical reports (design calculations, safety case reports, etc.).
• Delivery accountability for mechanical engineering solutions.
• Ability to liaise with, present to, and influence stakeholders at all levels.
• Proven track record of working effectively in project teams.

Responsibilities

• Solve complex mechanical engineering problems.
• Manage multiple projects simultaneously.
• Engage with complex jobs and provide innovative solutions.

Job description

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Mechanical Design Engineer – Nuclear, Sheffield

Location: Sheffield, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Reference: ada125ec9918

Job Views: 16

Posted: 12.08.2025

Expiry Date: 26.09.2025

Job Description:

Job Description

Are you a Mechanical Design Engineer who thrives on solving difficult engineering problems? Are you drawn to complex projects and excited by the opportunity to rapidly progress into leadership positions, heading up projects and guiding junior engineers?

If so, you might enjoy solving the energy industry’s most important mechanical engineering conundrums for a multitude of energy systems across various clients. You could be designing test rigs for UK nuclear fusion development, assessing structural integrity of primary plant for civil and defense applications, designing high integrity structures for new nuclear facilities, or leading renewable energy projects within a growing carbon net zero portfolio. The role involves managing multiple projects simultaneously, so adaptability is essential. The common theme is engaging with complex jobs and providing innovative solutions for diverse clients.

Whatever projects you undertake, you'll contribute to solving critical problems in the energy sector, making a meaningful impact on UK and global energy and environmental security.

If you're a self-starter capable of delivering multiple projects, collaborating with clients and internal teams to understand requirements, set up projects, and deliver right-first-time solutions, we encourage you to apply.

Learn more about how you can thrive with us.

Role Requirements:

• Degree qualified mechanical engineer (or relevant qualification)
• Experience in requirements capture, including functional, non-functional, stakeholder, and regulatory requirements
• Experience in generating design solutions via formal optioneering or similar processes
• Experience in mechanical engineering substantiation for new designs or existing plant
• Experience in writing detailed technical reports (design calculations, safety case reports, etc.)
• Delivery accountability for mechanical engineering solutions
• Ability to liaise with, present to, and influence stakeholders at all levels
• Proven track record of working effectively in project teams

Preferred Experience:

• Experience working with industry design codes
• Experience in bid writing within safety-critical and regulated environments
• Chartered status or nearing chartered status with a relevant professional institute

Why work for AtkinsRéalis?

We support the UK’s 2050 Net Zero target through our nuclear and clean energy teams, ensuring a mix of sustainable energy sources. We work on innovative projects across nuclear, renewables, decarbonization, and energy efficiency sectors, creating safe and resilient systems.

Learn more about our Vision for Women: Women at AtkinsRéalis (atkinsrealis.com)

Meeting your needs:

Enjoy our “Total Reward” package tailored to your lifestyle, including flexible holidays, health & wellbeing benefits, and career development support. We welcome applicants with disabilities and are happy to discuss any adjustments needed.

We are AtkinsRéalis, a global consultancy with over 100 years of engineering expertise, committed to delivering sustainable impact worldwide.

Additional Information:

This role may require security clearance, which depends on UKSV vetting processes. Candidates must have resided in the UK for at least 5 years. Please do not mention current or previous security clearances in your application.

We promote diversity and inclusion through family-friendly policies, flexible working, and employee networks. Applications from all backgrounds are encouraged.

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