Lead Thermal Engineer in City of London

Energy Jobline ZR; City Of London; Hybrid; GBP 50,000 - 75,000; Full time

Job summary

A leading energy job board is seeking a Lead Mechanical & Thermal Engineer in the City of London. This role requires expertise in thermal engineering and HVAC systems, with responsibilities including system design and team leadership. Competitive salary of £50,000 - £75,000 based on experience with opportunities for progression. The position offers a hybrid working model and additional benefits including company shares and pension.

Benefits

Company shares

8% pension

28 days holiday

Qualifications

• 10+ years of experience in thermal engineering, HVAC, automotive or similar sectors.
• Proven experience with thermal modelling and simulation software.
• Experience in HVAC controls or system integration with building management systems is desirable.

Responsibilities

• Lead the thermal and mechanical design of innovative heating and cooling systems.
• Design and evaluate heat exchangers to optimise energy performance.
• Oversee prototype development and testing.

Skills

Thermal engineering

HVAC systems

Thermodynamics

Heat exchanger design

Fluid mechanics

Education

Degree in Mechanical, Thermal, or Aerospace Engineering

Tools

ANSYS

COMSOL

Job description

Energy Jobline is the largest and fastest growing global Energy Job Board and Energy Hub. We have an audience reach of over 7 million energy professionals, 400,000+ monthly advertised global energy and engineering jobs, and work with the leading energy companies worldwide.

We focus on the Oil & Gas, Renewables, Engineering, Power, and Nuclear markets as well as emerging technologies in EV, Battery, and Fusion. We are committed to ensuring that we offer the most exciting career opportunities from around the world for our jobseekers.

Job Description

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.

Role Overview

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

Key Responsibilities

• 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.

Candidate Profile

• Degree‑qualified in Mechanical, Thermal, or Aerospace Engineering (or related discipline).
• 10+ years of 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.

What's on Offer

• 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.

WR HVAC | M&E are #1 recruitment partner for HVAC jobs.

Our customers include a range of large and small M&E companies, manufacturers and suppliers of heating, ventilation, air conditioning and refrigeration equipment. We recruit UK wide for sales, management and technical jobs. WR is acting as an Employment Agency in relation to this vacancy.

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.