Head of Design - Decarbonisation

Application Deadline: 11 February 2026

Department: Design

Employment Type: Full Time

Location: Mallusk

Reporting To: Associate Director

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 Head of Design for Decarbonisation to join our team. This pivotal role will shape the future of sustainable energy delivery across a diverse portfolio of public and commercial sectors.

The Design department is responsible for developing innovative, practical, and fully coordinated mechanical and electrical building 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.

As Head of Design, you will lead the technical development and detailed design of decarbonisation solutions, including district heating systems, energy centres, and renewable energy integrations. Working closely with internal and external teams, you will ensure robust, innovative, and compliant design output, with a strong focus on design coordination, technical detailing, and delivery assurance from Stage 2 onwards.

Job Title Head of Design - Decarbonisation

Location Northern Ireland (Banbridge or Mallusk)

Hours Monday-Thursday 8am-5pm and Friday 8am-3pm

Salary Competitive Depending on Experience

Responsible to Associate Director

• Develop and oversee the company's design strategy for decarbonisation projects, with a clear focus on detailed design delivery from RIBA Stage 2 to practical completion.
• Ensure technical accuracy and quality of detailed designs, drawings, and specifications, with an emphasis on performance, safety, and environmental compliance.
• Guide the integration of emerging technologies into detailed designs, including renewable sources, heat networks, and smart energy systems.
• Lead the production of detailed whole-system energy models, schematics, load calculations, plant selection, BoMs, and project-specific documentation.