Lead Thermal Engineer

Lead Mechanical & Thermal Engineer

Our client is seeking a highly skilled Lead Mechanical & Thermal Engineer to take ownership of the thermal system design, development, and optimisation of their flagship product range. This is an outstanding opportunity for a senior engineer who enjoys combining hands on technical work with leadership responsibilities in a fast moving R&D and manufacturing environment.

As Lead Mechanical & Thermal Engineer, you'll play a pivotal role in advancing thermal design and system performance - from concept to production. You'll lead a small, multidisciplinary team focused on developing high efficiency HVAC and heat transfer systems suitable for scalable commercial manufacture.

You'll bring a deep understanding of thermal dynamics, simulation, and heat exchanger design, alongside the ability to translate theory into practical, manufacturable solutions.

• Lead the thermal and mechanical design of innovative heating and cooling systems.

• Design and evaluate heat exchangers and heat transfer mechanisms to optimise energy performance.

• Oversee prototype development, testing, and design validation in collaboration with internal and external partners.

• Apply design for manufacture (DfM) principles and guide make versus buy decisions.

• Conduct thermal and CFD simulations using tools such as ANSYS, Comsol, or equivalent.

• Prepare detailed technical documentation, test reports, and specifications.

• Lead engineering risk assessments and de risk design elements early in the product lifecycle.

• Mentor and support a team of mechanical engineers, fostering a culture of collaboration and innovation.

• Liaise with suppliers and external engineering partners to ensure technical integrity and cost effectiveness.

• Degree qualified in Mechanical, Thermal, or Aerospace Engineering (or related discipline).

• 10+ years' experience in thermal engineering, HVAC, automotive, or similar sectors.

• Strong understanding of heat transfer, thermodynamics, and fluid mechanics.

• Proven experience with thermal modelling and simulation software.

• Skilled in heat exchanger design, testing, and validation.

• Experience in HVAC controls or system integration with building management systems (desirable).

• Track record of leading design projects from R&D through to manufacturing.

• Strong communication and technical writing skills, with the ability to lead and inspire others.

• Progression to Design Manager, Product Manager, Production Manager, Manufacturing Manager or similar
• Salary £50,000 - £75,000 depending on experience
• Full time, hybrid working
• Company shares
• 8% pension
• 28 days holiday