Mechanical Design Engineer - Plant Equipment

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

As a Mechanical Design Engineer - Plant Equipment you will join the Derby/Warrington/Manchester team to support our activities within the Nuclear Sector. You will support the technical delivery of HVAC system design solutions that provide tempered and conditioned air to Reactor Island facilities, alongside systems that safely extract and treat contaminated air prior to atmospheric discharge. You will contribute across concept and detailed design phases, ensuring that ventilation and cooling solutions meet nuclear safety, performance, and legislative requirements.

You will work closely with system leads and multi-disciplinary engineering teams to deliver integrated HVAC and chilled water solutions for safety‑critical nuclear environments.

• Location:
  
  Derby/Warrington/Manchester
• On Site: 2 days in one of the sites
• Clearance: BPSS
• Experience Level: 3-10 YOE

• Support delivery of mechanical and plant equipment design solutions for SMR applications
• Develop and manage technical requirements for plant equipment packages
• Produce and review technical deliverables including specifications, calculations and design documentation
• Support concept and detailed design activities for miscellaneous plant equipment systems
• Apply modularisation and standardisation principles to equipment design solutions
• Collaborate with suppliers and external partners during equipment development activities
• Coordinate with multi-disciplinary engineering teams to ensure technical integration and compliance
• Support engineering governance, quality assurance and design review activities
• Present technical solutions and design maturity at stakeholder and programme reviews
• Assist with supplier management and technical oversight activities
• Support delivery of programme milestones, cost and schedule objectives

Required Skills:

• Knowledge of mechanical or plant equipment engineering principles
• Experience developing equipment designs from concept through detailed definition
• Ability to manage technical scope and support equipment delivery activities
• Experience producing and reviewing technical engineering documentation
• Strong collaboration and stakeholder coordination skills
• Understanding of engineering governance and quality assurance processes
• Ability to balance technical, cost and programme considerations
• Ability to plan work, manage priorities and elevate technical risks appropriately

Required Qualifications:

• A Bachelor’s or Master’s degree in Engineering, or equivalent military experience

Desirable

Skills:

• Experience in nuclear or other safety‑critical industries
• Familiarity with verification and validation techniques
• Experience working within regulated engineering environments

We bring together entrepreneurial, tech‑driven people to deliver innovative solutions for leading companies. At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals. Join a passionate team and help build tomorrow, today.

• A personalised career path and a rewarding management style
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Cycle & Tech Scheme
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings & team buildings
• Flexible way of working (role dependent)

We support the Armed Forces Covenant and encourage applications from members of the Armed Forces community, including veterans,…