Every ESG report tells a story. Ours is one of progress, learning, and raising the bar. We are proud to share the Ethos 2025 Environmental, Social & Governance Report.

This report reflects a year where sustainability became even more embedded in how we operate, make decisions, and deliver value for our clients. As our business continues to grow, so too does our responsibility to create lasting positive impact.

Some milestones from 2025 include:
Climate Action: Our science-based emissions reduction targets were validated by the Science Based Targets initiative (SBTi), and we’ve already achieved a 32.9% reduction in Scope 1 and 2 emissions against our 2019 baseline.

People: We continued to strengthen diversity, equity and inclusion, reducing our mean hourly gender pay gap from 14.4% to 1.2% while increasing female representation across the business.

Looking Beyond Carbon: We completed our first biodiversity assessment using the TNFD LEAP approach, strengthening our understanding of nature-related risks and opportunities while continuing to improve the transparency and quality of our ESG reporting.

This report is the result of collaboration across the business. A huge thank you to everyone at Ethos who contributed their expertise, challenged ideas, shared data, and helped shape our sustainability journey.

While we’re proud of the progress we’ve made, we know sustainability is a continuous journey. We remain focused on accelerating decarbonisation, strengthening governance, and supporting the delivery of resilient, sustainable infrastructure for the future.

Aisling O’Connor started as an intern and now works as a project engineer. She encourages more young women to consider STEM roles. Aisling initially hesitated to pursue engineering as a woman, but seeing female engineers removed her doubts.

What sparked your interest in engineering?

I always enjoyed maths and physics, but quickly realised I preferred practical, experiment-based learning rather than pure theory, which led me to engineering.  I had reservations about becoming a female engineer, but those disappeared during my internship at Ethos.

How did your internship help shape your career?

In school, engineering was just lectures and coursework. At Ethos, I saw how those principles influence buildings people use daily, which helped me understand the impact engineers can have. I was drawn to Ethos given its focus on helping to shape and design buildings. I quickly realised that the engineering principles I’d been learning could be applied to building services.

I joined Ethos after college and gained valuable experience alongside structured training. Over time, my responsibilities increased, and I progressed to Project Engineer.

Why are programmes like TY outreach and STEPS important?

These programmes give students real exposure to engineering. TY students can shadow teams and see what engineering roles are like, and STEPS helps us introduce younger children to engineering.

Many students don’t realise the opportunities engineering offers. These programmes help bridge that gap by giving them a chance to meet engineers, ask questions and see what a STEM career can look like.