Sustainability Engineer

Axiseng M&E Ltd; Dublin; Hybrid; EUR 50,000 - 70,000; Full time

Job summary

A progressive engineering firm in Dublin is seeking a Sustainability Engineer to contribute to environmentally conscious design solutions. Responsibilities include conducting energy audits, performance simulations, and achieving green building certifications. The role requires strong technical knowledge and collaboration skills in a hybrid working environment, offering 23 days of holiday and continuous learning support.

Benefits

Hybrid working model

23 days of holiday

Employee referral bonus program

Company-sponsored professional membership fees

Annual performance reviews and career development

Qualifications

• Strong background in sustainable design, building physics, and performance simulation.
• Familiarity with industry tools.
• Experience working toward certifications like BREEAM, LEED, NZEB.

Responsibilities

• Deliver a broad range of sustainability and energy-related tasks.
• Produce high-quality technical reports, surveys, audits.
• Advise on technical strategy and project delivery targets.

Skills

Performance simulation

Environmental modelling

Energy audits

Green building certifications

Strong communication

Collaboration with multi-disciplinary teams

Education

Background in sustainable design

Tools

IES VE

Rhino/Grasshopper

EnergyPlus

CFD tools

Job description

About the Role

We are looking for a Sustainability Engineer to join our growing team and contribute to innovative, data-driven, and environmentally conscious design solutions. You'\'ll work across projects of all scales, supporting sustainable outcomes from early concept through to detailed design and delivery. This role is highly technical, requiring experience in performance simulation, environmental modelling, energy audits, and green building certifications such as LEED and BREEAM.

What You’ll Do

You’ll work alongside a Senior Sustainability Engineer to deliver a broad range of sustainability and energy-related tasks, including:

• 3D geometry and dynamic modelling for buildings and masterplans
• Heating and cooling load calculations (CIBSE Guide A)
• Natural ventilation strategies, overheating assessment, thermal comfort studies
• CFD simulations (indoor/outdoor airflow, heat transfer, occupant comfort)
• Renewable energy system modelling: PV, wind, CHP, heat pumps
• Energy audits and benchmarking
• HVAC systems performance modelling, optimisation, and savings
• Environmental comfort assessments (PMV, PPD, NZEB compliance)
• Compliance assessments: BER, UK/Irish Part L, ASHRAE 90.1 PRM

Certifications & Ratings

• LEED credits, daylight, ventilation, energy optimisation
• Lead and deliver the above activities across multiple projects
• Advise Project Managers/Directors on technical strategy and coordination
• Support fee budgeting, task prioritisation, and project delivery targets
• Produce high-quality technical reports, surveys, audits, and RFI responses
• Participate in and contribute to internal/external training and development

What We're Looking For

• Strong background in sustainable design, building physics, and performance simulation
• Familiarity with industry tools (e.g. IES VE, Rhino/Grasshopper, EnergyPlus, CFD tools)
• Experience working toward certifications like BREEAM, LEED, NZEB, etc.
• Proactive communicator with ability to collaborate across multi-disciplinary teams
• Detail-oriented and committed to delivering high-quality technical work

Why Join Axiseng?

At Axiseng, we’re passionate about shaping sustainable, efficient, and resilient buildings. You\'ll work in a forward-thinking, collaborative environment with opportunities to grow your technical expertise, lead cutting-edge projects, and influence real environmental outcomes. Benefits include:

• Hybrid working model offering flexibility
• 23 days of holiday with the option to buy or sell extra days
• Employee referral bonus program
• Company-sponsored professional membership fees
• Annual performance reviews and career development
• Travel tax or bike-to-work schemes
• Continuous learning support with mentorship and education
• Chartership support for professional growth
• Fun social events and monthly team lunches