Senior Mechanical Design Engineer at AtkinsRéalis – Jobs in UK

About AtkinsRéalis

AtkinsRéalis is a global engineering services and nuclear organisation delivering solutions across infrastructure and energy systems. The company brings together engineers, designers, consultants, and project professionals to support complex programmes and help create a safer and more sustainable future.

AtkinsRéalis is expanding its mechanical engineering team and is looking for experienced professionals to contribute to technically challenging projects across the UK nuclear sector.

Role Overview

As a Senior Mechanical Design Engineer at AtkinsRéalis, the successful candidate will take a leading role in delivering mechanical design solutions across complex engineering programmes. The position involves working throughout the design lifecycle, from concept development and feasibility studies through to detailed design and implementation.

The role supports major programmes covering nuclear new build, nuclear defence, life extension, and decommissioning. The engineer will collaborate with multidisciplinary teams, clients, and project stakeholders while providing technical leadership and supporting the development of other engineers.

The position is suitable for an experienced mechanical design professional who enjoys solving complex engineering challenges and contributing to nationally important projects.

Key Responsibilities as Senior Mechanical Design Engineer

• Lead and support engineering teams working on complex mechanical design projects
• Design and develop mechanical equipment while maintaining high standards of safety, quality, and efficiency
• Deliver engineering work across the complete design lifecycle, from concept and feasibility through to detailed design and implementation
• Use advanced 3D CAD tools and machinery design expertise to develop practical and fit-for-purpose solutions
• Provide technical guidance on manufacturing, assembly, and installation approaches
• Ensure designs comply with relevant regulations, standards, and industry requirements
• Work closely with multidisciplinary teams, clients, and project stakeholders
• Contribute technical expertise to proposals, budgets, project planning, and schedules
• Support feasibility studies, optioneering activities, and design reviews
• Build effective working relationships with clients and colleagues
• Mentor and support junior engineers through coaching, knowledge sharing, and best-practice development
• Provide technical input to engineering decisions and help deliver successful project outcomes

Job Details

Job Title: Senior Mechanical Design Engineer
Company: AtkinsRéalis
Locations: Derby, Derbyshire; Sheffield, South Yorkshire; Glasgow
Job Reference: R-163430

Security Clearance & Additional Information

The role may require security clearance, with employment offers dependent on obtaining the appropriate level of clearance. The vetting process is handled through United Kingdom Security Vetting (UKSV) and may require candidates to provide evidence of five or more years of UK residency.

The company also states that it is an Equal Opportunities Employer and offers flexible working arrangements and inclusive employment policies.

Start a Career With AtkinsRéalis

This Senior Mechanical Design Engineer opportunity provides experienced engineers with the chance to contribute to complex nuclear and engineering programmes while developing their technical and leadership capabilities.

Candidates joining AtkinsRéalis can work alongside multidisciplinary engineering professionals, support major projects, share technical knowledge, and contribute to engineering solutions designed to address important infrastructure and energy challenges.

Apply Now for the Senior Mechanical Design Engineer position with AtkinsRéalis and take the next step in an engineering career focused on complex mechanical design and major UK programmes.