Mechanical Design Engineer (Nuclear and Industrial Engineering)

Location: Chorley or Whitehaven, United Kingdom. Hybrid and flexible working arrangements are available; travel to client and project sites may be required.

Salary: Competitive salary package with bonus and benefits.

Company

Actemium Design is a national engineering design company within VINCI Energies, delivering mechanical, EC&I, process engineering, design, project management, and control services for regulated industries.

What you will do

• Develop and check mechanical design deliverables, including equipment layout drawings, component designs, 3D CAD models, calculations, and technical reports.
• Deliver projects from concept through detailed design for nuclear, energy, process, oil and gas, and heavy-industry applications.
• Collaborate with EC&I, process engineering, project management, clients, and other multidisciplinary stakeholders.
• Perform engineering calculations, design validation, design reviews, risk assessments, safety studies, and constructability workshops.
• Review technical documents, drawings, and calculations to support design quality, statutory compliance, and continuous improvement.
• Prepare technical specifications, project documentation, procurement packages, and client proposals; mentor junior engineers and designers.

Requirements

• Relevant mechanical engineering qualification: Degree, HNC, HND, or equivalent experience.
• Proven mechanical design experience, ideally in regulated sectors such as nuclear, energy, oil and gas, process, or heavy industry.
• Strong understanding of mechanical engineering principles, mechanical systems and assemblies, and plant and equipment design.
• Experience producing or checking 2D drawings and 3D models using CAD software such as AutoCAD, Inventor, or similar.
• Knowledge of UK and international engineering standards and statutory regulations.
• Effective communication skills, including explaining technical concepts clearly and working with diverse teams and clients.
• Analytical, detail-focused, and capable of problem-solving and continuous improvement.
• Full UK driving licence or ability to travel to client and project sites as required.
• Eligibility for certain positions may be affected by place of birth, nationality, current or former citizenship, and current or former residency because of national security clearance restrictions.

Culture & Benefits

• Full-time employment at 37.5 hours per week with hybrid and flexible working arrangements.
• Competitive salary, annual bonus, generous pension contributions, and Health Shield healthcare plan.
• 26 days of holiday plus bank holidays, EV car scheme, company share scheme subject to qualifying periods, and death-in-service insurance.
• Structured career development through mentoring, technical training, and progression from Designer and Engineer through Senior and Principal Engineer levels.
• Inclusive, supportive environment focused on technical achievement, innovation, knowledge sharing, and collaboration.