Sustainability Engineer / IES Modeller

Dublin / London / Oxford / Newcastle / Guildford

RED is an expanding international M&E consultancy, with a proven track record in low energy design, focused on providing excellent design solutions to clients.

We are looking for a SSustainability Engineer / IES Modeller to join our Sustainability Solutions & Climate Change team.  The ideal candidate will lead wide ranging sustainability appointments under the RIBA Green overlay framework with an emphasis on LCA for standalone reports but also for LEED & BREEAM credits.

The ideal candidate will have a full UK driving licence.

Role Responsibilities 

  • Good technical knowledge of sustainability in the built environment
  • Undertake IES thermal modelling for the sustainability team relating to:
    • Part L Compliance
    • Energy Performance Certificates
  • CIBSE Heating & Cooling Loads
  • Thermal Comfort & Daylighting Assessments
  • Issuing of RFIs, reports, calculations, technical reports, presentations, method statements and action lists.
  • Assisting with BREEAM/LEED/WELL/NABERS/RIBA Green overlay related bid and tender preparation and co-ordination
  • Flexibility to assist our engineers in meeting business/project deadlines

Role Requirements

  • Good technical knowledge of sustainability in the built environment
  • Good knowledge on the IES required for: LEED, BREEAM, EPC ratings, planning applications etc.
  • Educated to degree level in engineering/ environment discipline
  • Qualified Low Carbon Energy Assessor (LCEA) (desirable)
  • IES software to model geometry building, HVAC systems and model outputs
  • General understanding of Building Services design
  • Good knowledge of excel, word, PowerPoint and outlook
  • Good knowledge of working online remotely from home using Zoom/Teams/Google Docs
  • Accuracy/excellent attention to detail


Salary commensurate with experience.   

Our people work in friendly teams with a collaborative approach and mentoring support from talented leaders.  

We offer a comprehensive benefits package and are an equal opportunities employer.

The role will ideally suit UK nationals as we are unable to offer sponsorship at the present time.

Interested applicants may send their resume to


Location: Dublin / London / Oxford / Newcastle / Guildford

Region: Europe

Salary: Competitive

Ready to join the team?

If you think you have what it takes to join an award winning team and help RED continue its exciting journey, we want to hear from you.