Plumbing and Heating Engineer - Senior

At 21°, we’re on a mission to transform how homes and buildings use energy. We empower homeowners, architects, and businesses with the knowledge, tools, and technology to generate their own sustainable energy—reducing carbon, cutting costs, and creating healthier, more comfortable spaces to live and work.

From a single upgrade to full Passivhaus-level design, we take a whole-system approach - because great buildings aren’t built in parts, they’re designed as a complete ecosystem.

• Solar PV & battery storage
• Air & ground source heat pumps
• Triple-glazed windows & doors
• MVHR (Mechanical Ventilation with Heat Recovery)
• Insulation & air tightness solutions

We’re growing rapidly and looking for a skilled, and customer-focused Engineer to join our Cambridge team.

Here, you’ll go beyond assessments—you’ll become part of a multidisciplinary team shaping the future of sustainable homes. We invest in your development so you can expand your skillset across multiple renewable technologies and even support installations.

You’ll primarily work locally, with occasional opportunities to collaborate with teams across the UK.

• Survey homes for air source & ground source heat pumps, solar PV, batteries, and EV chargers
• Manage a team of heating engineers.
• Conduct site visits, plan-based assessments, and remote surveys
• Identify installation challenges and design practical solutions
• Map cable routes and system layouts
• Advise customers on optimal equipment placement
• Capture key data and site imagery
• Clearly explain systems and benefits to customers
• Ensure accurate, timely completion of survey documentation
• Asssit with installations as needed

• You won’t be siloed - you’ll learn across multiple technologies
• You’ll play a hands‑on role in the energy transition
• You’ll grow with a company that’s scaling fast and investing in its people

• Company van & fuel card or car allowance + expenses
• 25 days holiday + bank holidays (incl. Christmas shutdown)
• Private Medical Insurance
• Enhanced family-friendly policies
• Life assurance

• Full UK driving licence
• Low temp heatign design
• Experience with Heat Pump design using H2X
• Extensive renewable industry experience, particularly working with air source heat pumps
• Ability to manage a customer relationship to the point of operational handover
• Excel at creating new business opportunities with homeowners, architects & developers
• Works well under pressure to achieve sales targets
• Punctual & smart appearance

• Domestic Energy Assessor qualification
• Solar PV & battery storage knowledge

We’re not just building energy systems - we’re building a team that reflects the future we want to create.

At 21°, people come first. We actively support your growth, encourage curiosity, and create an environment where you can thrive.

We know that great candidates don’t always tick every box - so if you’re motivated, eager to learn, and excited about sustainable energy, we’d love to hear from you.

We’re proud to be an inclusive, equal opportunity employer. If you need any support or adjustments during the recruitment process, just let us know at

Ready to Help Change the Way the World Uses Energy?

Join us - and be part of something bigger.

Job Type: Full-time, Permanent

• Company pension
• Free parking
• On-site parking
• Private medical insurance
• Sick pay

• Renewable Energy Surveying: 5 years (required)