About Us
Our Story
Modern businesses face mounting environmental and social pressures, yet many struggle with where to start and how to create lasting impact.
Founded in 2022 by Justin Cullen, Niall Collins, Anthony Quigley, and Brendan Nevin, the Institute of Sustainability Studies (ISS) empowers organisations with practical knowledge and tools to drive measurable change that enhances profitability and resilience.
Our accredited corporate sustainability training is designed for immediate application across all levels—because true innovation happens when every team member has the right knowledge, skills, and mindset. With flexible programmes that fit diverse business needs and schedules, we help you embed sustainability into your organisation’s culture.
The result: reduced risk, lower costs, new revenue streams, and a future-ready business.
Learn about the Institute of Sustainability Studies' mission and vision.
Justin Cullen
Executive Chairman of ISS
To empower organisations and their teams with practical, real-world sustainability knowledge and tools that drive positive change, reduce risk, and unlock long-term value.
A future where sustainability is embedded into every business decision, creating a world where environmental responsibility and economic prosperity go hand in hand.
1000+
professionals trained
150+
companies with enrolled learners
90%
of participants are ready to endorse our courses to peers
96%
feel more confident in tackling sustainability challenges
100%
say they feel closer to achieving their sustainability goals
Our Values
The principles that shape how we educate, collaborate, and drive meaningful change in organisations.
We cut through complexity with clear, targeted, actionable solutions that deliver immediate value to your organisation.
We listen, learn, and adapt to meet the evolving needs of our customers—designing practical, outcomes-driven solutions.
We deliver high-quality, expert-led learning experiences—grounded in real-world application and designed to achieve measurable outcomes.
We keep pace with the ever-evolving world of sustainability, ensuring customers stay ahead with cutting-edge solutions.
Continuous learning is at our core—we iterate, adapt, and improve to ensure our work drives real change where it matters most.
We’re committed to making the world more sustainable because we believe in responsible business to shape a better future.
See how we can help your organisation grow in a sustainable way
What our graduates say
Learn how our courses have helped participants from all backgrounds develop a comprehensive understanding of sustainability in business and take action.
Sheena Crean
Banking Professional
"I couldn’t recommend this course highly enough — an information-dense trip from the drive to net zero to the fundamentals of circular economy. Particularly enjoyed learning how to get ready for CSRD!”
