Overview

Engineering a clean future for industrial heat.

HotGreen exists to make heat pumps commercially-viable to industry. With smart-engineering solutions and a patent-pending compressor technology, we are making heat pumps a competitive option versus traditional boilers: saving plants money by switching to green steam.

We are building the most commercially viable heat pump to tackle the vast opportunity in industrial heat below 250°C, representing 10% of global emissions.

Our goal is to enable profitable decarbonization of industrial heat without reliance on subsidies or regulation.

You will be employee number 1. By nature of being an early-stage, fast-moving start-up, you will not initially have direct reports, but you will need to hire in time to develop out our technology department.

The job is primarily an in-person role. We are identifying a site in the broader Greater London (West) / Reading area, likely on the Elizabeth or Waterloo lines. We have been based in Datchet and are relocating to a new site.

Responsibilities

• Design industrial heat pump systems and adapt designs to meet unique, site-specific requirements for food & beverage industrial facilities.
• Lead front-end development and system packaging for customers, ensuring smooth integration with existing plant infrastructure and providing design-for-installation support.
• Experience working with steam systems to effectively integrate our steam generating heat pump into the pipework of an industrial site.
• Engineer hybrid heating solutions by integrating heat pumps with gas boiler systems, enhancing process energy flexibility in large installations.
• Serve as the primary technical expert and liaison for industrial customers, providing engineer-to-engineer support from system concept through commissioning.
• Interpret customer process and utility data to develop technical proposals, including performing detailed sizing calculations for industrial-scale heat pumps.
• Support the commercial team by enabling technical sales conversations and presenting at industry events and conferences. Advise clients and project partners on design, operation, and optimization of heat pump installations at large industrial sites.
• Select and integrate high-capacity components such as condensers, evaporators, valves, and controls—all tailored for demanding industrial environments.
• Ensure industrial systems comply with regulation, code, safety, and reliability standards; stay current on emerging regulations, standards and practices.
• Translate demonstrator data and customer feedback into actionable product improvements for future products.

Required Skills & Qualifications

• Bachelor’s or Master’s degree in Mechanical, Chemical/Process, Design or Energy Engineering (or related discipline).
• Several years’ experience with HVAC, refrigeration cycles, process systems, and hybrid heating solutions with a focus on industrial deployment.
• Deep understanding of thermodynamics, fluid mechanics, and heat transfer as applied to industrial energy systems.
• Advanced proficiency with engineering and simulation tools (e.g., Solidworks, Ansys) and interpreting P&ID drawings.
• Strong communication skills with ability to support engineer-to-engineer sales and interface effectively with clients, project teams, and field engineers.
• Willingness to travel for site surveys, installation support, and customer meetings (domestic/international as needed).
• Right to work in the UK

How to apply

Send a PDF CV and Cover Letter to careers@hotgreensolutions.com with the subject: "[FIRST NAME, SURNAME] Senior Heat Pump Engineer".

Within your cover letter, answer the following three questions:

1. Why are you interested in applying for HotGreen?
2. What experience do you have that will enable HotGreen’s first industrial deployment to be a success?
3. What frustrates you about industrial heat pumps today?

Applications to any other email address or via LinkedIn will not be reviewed.

Deadline: 7th September

We will be beginning interviews on the 8th of September. As such, if we have sufficiently high quality candidates apply, we will be closing the funnel to new candidates.