Graduate Sustainability Engineer

About the Role

As one of Ireland’s most progressive and people-focused building consultancies, we are strengthening our pipeline of junior engineers for a Graduate Sustainability Engineer.

As a Graduate Sustainability Engineer, you will support the delivery of energy audits, energy efficiency projects, and sustainability initiatives across a diverse client base. Working alongside experienced engineers and project managers, you will gain hands-on experience delivering practical solutions that help clients reduce energy consumption, improve building performance, and meet Ireland's sustainability and Climate Action targets.

This role offers an excellent opportunity to build your technical knowledge while contributing to projects across a range of sectors.

Key Responsibilities

• Support the delivery of energy audits and energy performance assessments across a range of building types.


• Assist in identifying energy efficiency and decarbonisation opportunities for clients.


• Collect, analyse and interpret energy consumption data.


• Support the preparation of technical reports, energy assessments and client recommendations.


• Assist with BER assessments, Part L compliance and building energy modelling where applicable.


• Contribute to ISO 50001 Energy Management System projects under the guidance of senior engineers.


• Attend site visits to gather data and support project delivery.


• Liaise with multidisciplinary teams, including Mechanical, Electrical and Sustainability Engineers.


• Keep up to date with Irish Building Regulations, Climate Action targets and industry best practice.


• Support senior engineers with project delivery, technical research and client presentations.

Essential Requirements

• Bachelor's degree (NFQ Level 7 or higher) in Energy Engineering, Mechanical Engineering, Electrical Engineering, Building Services Engineering, Sustainable Energy, or a related discipline.


• Strong interest in sustainability, energy efficiency, and low-carbon building design.


• Familiarity with Irish Building Regulations and energy performance principles through university studies or placement experience.


• Strong analytical and problem-solving skills.


• Excellent written and verbal communication skills.


• Good organisational skills with the ability to manage multiple tasks.


• Full, clean driving licence and willingness to travel to client sites as required.


• Confident in reading drawings and managing construction documentation


• Excellent communication and stakeholder management skills


• Proactive mindset with a desire to continuously learn and develop

Desirable Requirements

• Experience within consultancy environment


• Internship, placement, or project experience in sustainability, building services, or energy engineering.


• Awareness of energy auditing and S.I. 426 requirements.


• Knowledge of BER assessments, DEAP, Part L Compliance, or building energy modelling.


• Awareness of ISO 50001 Energy Management Systems.


• Interest in working towards professional accreditation such as Engineers Ireland, CEM, or CEA

What We Can Offer You

Being part of ORS means more than just a job, it means joining a company that invests in you and your ambitions with transparency, structure and support.

We are delighted to offer a suite of benefits when you join ORS, which include:

• Join our award winning Graduate Program


• Competitive salary


• Performance-related bonus


• Pension scheme with matching contributions


• Remote-first hybrid model – use your home as a base and any of our office locations as you see fit


• Work from abroad


• Flexible working hours


• Access to over 60 health disciplines through our Kara Connect Platform


• Continuous Professional development (CPD) programme & funding


• Paid maternity, paternity and fertility leave


• Company and birthday annual leave days


• Death in Service benefit


• Tax saver - travel and bike to work


• Culture, social, wellness and CPD committees


• Talent Development Programmes


• Access to leading career coach Gerry Duffy

About ORS

ORS is a world-class multidisciplinary building consultancy with more than 30 years of delivering technical excellence across the built environment. Our mission is simple but powerful: We endeavour to make the lives of our team, clients, partners and communities happier and better in the ways that really matter every single day.

Don’t just take our word for it! ORS has won numerous awards, recognising our Great Place to Work culture.

• Awarded Consultancy Firm of the Year at the Irish Design & Build Awards 2026 


• Winner of the Engineering Consultancy of the Year at the Engineering Excellence Awards 2025


• Winner of the Graduate Programme of the Year at the Engineering Excellence Awards 2025


• Winner of the Best Company to Work For at the Irish Design & Build Awards 2024 & 2025


• Winner of the Best People Development of the Year at the Engineering Excellence Awards 2024


• Winner of the Recruitment & Retention Strategy at the Workplace Excellence Awards 2024


• Great Place to Work certified consecutively since 2017


• Top 3 Company Best Workplaces in the medium-sized category at the Great Place to Work awards 2025


• Best Workplaces for Health & Wellbeing 2025 Great Place to Work


• Engineers Ireland CPD Accreditation since 20217


• Awarded for Hybrid Way of Working at the 2022 Great Place to Work Awards


• Silver Accreditation through Investors in Diversity 2025

ORS is committed to creating a diverse and inclusive company culture. We foster a culture of inclusion for all employees that respects and supports their individual strengths and experiences.