Senior Heat Pump Field Application Engineer

Octopus Energy

4300

Slough (GB), USA

Posted on: 2026-01-30

Category: energy

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Employment type:

Full time

Experience required:

Senior

Salary

Salary not provided

About the company:

We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.

That means making power greener, smarter, and more affordable for everyone.

We put customers at the heart of everything we do: with always-fair prices, transparency and outrageous customer service.

We drive system change: with transformative tech to make renewable energy the norm and end global reliance on fossil fuels.

Octopus Energy Group is made up of 10 businesses spanning 6 countries across 3 continents, including: Octopus Energy Retail, Kraken Technologies, Octopus Energy Generation, Kraken Flex, Octopus Electric Vehicles, and the Octopus Centre for Net Zero. More on OEG @ octopusenergy.group

Help us make a big green dent in the universe. We're on a mission to drive the global renewable energy revolution, and we need loads more people to help us make our vision a reality.

At Octopus Energy, we're on a mission to revolutionise the energy industry. We believe energy should be affordable, green, and easy for everyone. As a rapidly growing renewable energy supplier, we're looking for talented individuals to join our dynamic team. If you're passionate about sustainability, innovation, and making a positive impact, we'd love to hear from you.

We are seeking a passionate field application engineer to join our Product Engineering team at Octopus Energy. As a Field Application Engineer, you will play a crucial role in being the technical interface between the R&D Design teams and the field installation and operations teams.

If this sounds like you then we'd love to hear from you.

Are you ready for a career with us? We want to ensure you have all the tools and environment you need to unleash your potential. Need any specific accommodations? Whether you require specific accommodations or have a unique preference, let us know, and we'll do what we can to customise your interview process for comfort and maximum magic!

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

What you will do:

Be the main interface between the product design team and the field installation teams

Identify areas for improvement in all aspects of the system from design to manufacturing, installation and processes

Provide technical design advice and guidance to the field design teams

Work closely with the support, field and the operations teams, provide day to day support to all heat pump installs

Actively provide customer support as required

Continuously monitor the performance data (e.g. COP/SCOP) collected for every install, debug issues, maintain the issue log, and advise improvements

Maintain the spares list and update as a new product is introduced

Travel to customer sites as required, as well as to Portadown in Belfast to work closely with the R&D and the manufacturing teams

Contribute to the training of the support and installation teams as required

Be the owner of technical documentations for installers, customers, logistics

Present technical solutions to the design team

Analyse warranty returns and interface with suppliers on technical discussions in finding the route cause

What you'll need

Degree in mechanical engineering or a similar discipline

5+ years field application experience in heat pumps, refrigeration products and solutions

Understanding of heat pump design and HVAC systems

Deep knowledge for heat pump components (e.g compressors, inverters, fans, evaporators, condensers), thermodynamics and refrigeration circuits, power electronics and hydraulic system design

Understanding of standard compliance, regulations and legislations relevant to heat pump design and residential installations (MCS, F-gas, relevant EN specifications)

Experience in retrofit and new build heat pump installs

Appreciation of smart electronic control systems relevant to heat pump system design