Your new company Hays are supporting a growing renewable energy provider that specialises in delivering modern, low-carbon heating solutions across domestic and commercial projects. With demand for sustainable technologies increasing rapidly, they are expanding their design team and are now seeking a Renewable Heating Design Engineer to help drive forward a diverse portfolio of future-focused projects. If you're passionate about low-carbon design, heat pump technology, and the transition to a greener built environment, this is an excellent chance to join a business that is genuinely invested in innovation and long-term sustainability. Your new role As a Renewable Heating Design Engineer, you will take the lead on designing efficient, compliant, and reliable heating systems across a range of applications. You'll work on both traditional and renewable-based solutions including heat pumps, whilst ensuring every system meets UK & Irish regulations and performance standards. You'll collaborate closely with installation teams, project managers, and clients, providing technical support throughout the full project lifecycle. Design domestic and commercial heating systems aligned with project requirements Deliver accurate heat-loss calculations and system sizing Develop low-carbon and renewable system designs, including heat pumps Produce drawings, schematics, and detailed design documentation Ensure full compliance with UK & Irish building regulations and sector standards Interpret technical surveys and project information Support installation teams during delivery, installation, and commissioning Troubleshoot technical issues and optimise system performance What you'll need to succeed HNC / HND / Degree in Building Services or Mechanical Engineering, OR equivalent industry experience Experience in heating system design (domestic and/or commercial) Strong understanding of low-carbon heating and renewable technologies Competent in heat-loss calculations and system design principles Working knowledge of UK building regulations (Irish regs beneficial) Experience with heating design and drawing software Ability to read and interpret technical data Strong attention to detail and problem-solving abilities Full UK driving licence & UK work eligibility What you'll get in return Competitive salary based on experience Genuine long-term career pathway within an established renewable energy organisation Supportive, collaborative environment with experienced engineering professionals Opportunity to work across a varied project portfolio (domestic + commercial) Involvement in forward-thinking, sustainable heating solutions Real scope for progression and ownership of innovative design projects What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be Skills: Mechanical Design Engineer Renewable Energy Low Carbon Design Heat Pumps Building Services Benefits: £40000 - £50000