Principal Mechanical Design EngineerApplication Deadline: 23 January 2026Department: DesignEmployment Type: Full TimeLocation: DublinReporting To: Associate DirectorDescription
The opportunity has arisen to join an industry leader in UK's & Ireland's commercial decarbonisation sector. At Alternative Heat, we are at the forefront of innovative, sustainable building solutions. As a leader in the design, development, and delivery of offsite-prefabricated energy systems, we take pride in offering groundbreaking decarbonisation solutions throughout Ireland, UK and Europe.
As part of our mission to drive the transition to renewable and low-carbon energy solutions, we are excited to announce an opportunity for a Principal Mechanical Design Engineer to join our team. This pivotal role will shape the future of sustainable energy delivery across a diverse portfolio of public and commercial sectors.
Team Overview:
The Design department is responsible for developing innovative, practical, and fully coordinated mechanical and electrical services solutions tailored to each project. Working closely with clients, project teams, and the BIM department, the design team transforms concepts into detailed, build-ready technical designs that meet regulatory standards, client specifications, and sustainability goals. Their work underpins the technical accuracy and efficiency of our installations, ensuring seamless integration from planning through to construction.
Role Overview:
As a Principal Mechanical Design Engineer, you will play a key role within our growing Design Team, based at our Dublin Office. You'll take ownership of mechanical designs from concept through to commissioning, working closely with fabrication, project management, and commissioning teams to ensure seamless delivery.
You'll be involved in the design of commercial decarbonising solutions across a diverse portfolio of sectors, while also mentoring junior engineers and helping to shape best practice within the team.
Job Title | Principal Mechanical Design EngineerLocation | Dublin OfficeHours | Monday-Thursday 8am-5pm and Friday8am-3pmSalary | Competitive Depending on Experience Responsible to | Head Of DesignWhat You'll be DoingManaging the design delivery for decarbonising a range of commercial projects. Delivering mechanical designs including schematics, calculations, plant selections, bills of materials, and project specificationsDeveloping and validating BMS control strategies, from design through to on-site verification
To apply please click on the link provided or reach out to Nicola Hyland (Senior Talent Acquisition Specialist) -