About Us
At ESG Strategy, sustainability isn’t just what we do, it’s who we are.
Founded by industry leaders Lee Stewart, Ann Austin, and Mark Lyster, our team combines passion with a proven track record of driving transformative change in some of the world’s most influential companies. We understand the pressures of a rapidly evolving world and are here to help your business not only adapt but thrive.
Who We Are
With decades of experience as former heads of sustainability, we know firsthand the challenges businesses face. Our tailored strategies integrate sustainability into your operations, empowering leaders and building in-house expertise to create lasting growth, resilience, and success.
Our Team
ESG Strategy unites global experts with deep industry knowledge in sustainability, ESG risk, and climate action. Our team has led award-winning projects across diverse sectors and is driven by a shared mission: making sustainability practical, impactful and achievable.
Founding Directors
Associates
Our Partners
We proudly collaborate with industry-leading organisations that share our commitment to sustainability. Together, we create impactful, sustainable solutions that benefit businesses and the communities they serve.
DETA Driving Sustainability Together
DETA collaborates with ESG Strategy to deliver integrated energy and sustainability solutions across New Zealand, Australia, and the Pacific. Together, we empower businesses to optimise energy, reduce carbon footprints, and achieve measurable progress in sustainability.​​
"ESG Strategy’s expertise was transformative in crafting and implementing a sustainability strategy for a key manufacturing client, earning exceptional feedback and delivering clear, impactful results. ​
Jonathan Pooch
Managing Director – DETA Consulting ​
About Positive Futures Advisory
Positive Futures Advisory, led by Roger Swinbourne, is a strategic partner of ESG Strategy. With over 25 years of experience in sustainability, resilience, and strategic planning, Positive Futures delivers innovative solutions to complex challenges across property, infrastructure, and policy sectors.
Drawing on Roger’s leadership roles at global firms such as Arup, AECOM, and Urbis, Positive Futures specialises in climate resilience, circular economy, and sustainable finance. The consultancy helps clients develop practical strategies that manage risks, meet regulatory requirements, and unlock long-term growth opportunities.
Focused on future-ready planning, Positive Futures combines business planning, governance, and risk management expertise to balance economic, social, and environmental priorities. Together with ESG Strategy, Positive Futures supports organisations in building resilient, sustainable outcomes that align with global standards and drive positive change.​​
About Baret Advisory
Kristie is a founding director and consultant at Baret Advisory, working in collaboration with ESG Strategy on the key ESG challenges facing organisations today. With a focus on risk management, compliance, governance and process efficiency.
Kristie brings over 20 years of international leadership experience in banking and financial services to support organisations of any size and industry to solve complex ESG problems.
