Our Story
Founded by Paul O’Reilly and Paul Mahon in 2020, Watt Footprint has saved over £8 million for our clients to date by reducing energy wastage.
OUR STORY
Who Are We?
We began in Ireland in 2020, the result of a unique partnership between two founders from different generations- one bringing decades of industry experience, the other a sharp, future-focused digital edge. Together, they saw a better way to engage with energy- not as a utility, but as an opportunity for change. From our Irish base, we’ve built a global platform that challenges how energy is understood, tracked, and used. Paul O’Reilly and Paul Mahon aren’t just part of the energy conversation, they are reshaping it, and proving that when experience meets innovation, real disruption happens. Watt Footprint’s impact is increasing globally- driven by a deep respect for where we started, and an even bolder vision for where we are going. Watt Footprint expanded into the UK in 2024 to meet the region’s rapidly growing demand for energy efficiency, carbon reduction, and ESG compliance. With the UK’s 2030 Climate Targets and an increasing regulatory push for sustainability and our longstanding expertise, Watt Footprint is actively contributing to the UK’s green transition into the future.
ABOUT US
Our Mission
Our mission is to empower individuals and businesses to take control of their energy impact with clarity, simplicity, and purpose. We combine advanced data tools with intuitive design to make energy usage more transparent and actionable. Whether you’re just starting your sustainability journey or managing complex energy needs, Watt Footprint provides the insights and support to help you make real savings, reduce waste, and create meaningful change for the planet- today, tomorrow, and long into the future.
Our Impact
AT A GLANCE
3 Global Offices
8,168,377+ saved on energy
The amount of kilowatt hours (units of energy) we have saved is the equivalent of…
Running a mid-sized data centre for 6–8 years.
Neutralising the carbon footprint of a small city (about 25,000 people)
Powered a village in a developing country for multiple decades
Five Values, One Mission
The principles that power Watt Footprint
And we wrote the book on it.
Back in 2016 Watt Footprint was published.
Four years later, the company was born.
We understand the importance of making a positive impact on the environment while also benefiting our finances.
That's why we take a proactive and hands-on approach to help you actively reduce your energy consumption and save money. With our expert guidance and cutting-edge software solutions, achieving significant energy savings becomes effortless and rewarding.
Meet The Founders
Paul O’Reilly
Paul O’Reilly is the Chairman and founder of Watt Footprint.
Paul is an award-winning entrepreneur, speaker, author and energy consultant with over 25 years experience. He has been an advisor for both public and private sector organisations for energy efficiency and cost savings, including interpreting government and international legislation and advising businesses on financial models to capitalise on green funding opportunities including grants and supports.
In 2016, Paul published a non-fiction guide for the Irish citizen to save energy in the modern world. The book had the same title of his company today; Watt Footprint.
Paul was the co-founder of the international engineering firm ORS which he sold in 2019.
Paul Mahon
Paul Mahon is the CEO and founder of Watt Footprint. He provides visionary leadership to the team, is at the crux of all major decision-making within the company, and drives Watt Footprint towards betterment and growth, both internally and internationally.
Paul has been working in the sustainability sector for the last 7 years. Having worked with Paul O’Reilly as part of the international engineering firm ORS previously, he was headhunted based on his performance, technical, and intrapersonal skills.
Before stepping into the role of CEO at Watt Footprint, Paul hurled underage for Coolderry, County Offaly. He also holds a degree in Mechanical Engineering. Paul now leads the rapidly growing team at Watt Footprint with enthusiasm, intelligence, and wit.
Meet The Team
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Heather O'Reilly Duff
Head of Operations
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Jenny O'Reilly
Head of Sales and Business Development
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Jeff Lyons
Chief Research Officer
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Finula O'Brien
Residential Project Manager
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Diarmuid Harte
Energy Engineer
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Fergal Gilmartin
Energy Engineer
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Sarah Donegan
Executive Assistant
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Kevin Butler
Senior Energy Engineer
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Kevin Folan
Technical Manager
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Timmy McCarthy
Energy Engineer
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Thomas Noone
Energy Engineer
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Harvey Cummins
Sales Development
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Justina Tumeleviciene
Assistant Accountant
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Ronan Connor
Data Analyst
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Stephen St Leger
UAE Country Manager
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Mia Groom
Software Lead
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Ultan Kearns
Full Stack Engineer
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Nicolas Comyn
Project Coordinator
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Mary-Kate O'Mahony
Marketing Executive
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Su Heffernan
Energy Engineer
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Mirza Shaheen Baig
Senior Energy Engineer
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Eoighan-Rua McGowan
Energy Engineer
