Our Team

We're one small team of five dedicated to helping people reduce their carbon footprints & adopt an environmentally sustainable lifestyle. Want to work with us? We'd love to hear from you! 


Lily Dempster

Founder & CEO

Lily is the Founder & CEO of One Small Step. She previously worked as GetUp's former Market Impact Director where she ran digital consumer campaigns that switched thousands of Australians to zero carbon energy products online. She is a highly experienced grassroots environmental campaigner and an expert in behaviour change, sustainability, and climate change mitigation, with a background in political science, public policy and law. 


Marc Stringer

Tech Lead

Marc studied a Masters of Electrical Engineering at the University of Melbourne. Since then, he has worked in start-ups, including an Internet of Things (IoT) consultancy, and has previously founded a medical device company. Marc is passionate about project management and app development, helping to ensure the quality and progression of the One Small Step app.


Remi Micallef

Content Producer 

Remi studied Information Technology at Swinburne University & has experience setting up and maintaining database systems for the government, private sector and various not-for-profit social enterprises. Remi is passionate about ecological conservation and carbon modelling, and is committed to the continued transparency & development of One Small Step’s content to create diverse & impactful outcomes.


Lois Vergel

Product Designer

Lois studied a Bachelor of Communication Design and Marketing from Swinburne University. Since then, she’s used her visual design and branding skills to help a range of companies in the health, arts, eCommerce & start-up space. Lois is passionate about building brands that positively change the way we think, feel and act, and strives to create delightful experiences with the One Small Step app.


Tessa Marano

Content Lead

Tessa is a specialist in marketing and content. Previously, she was Content Creator and then Head of Fundraising at 1 Million Women where she ran campaigns and rolled out content and communications to mobilise women and girls to act on climate change. Tessa aims to use strategic communications to help drive large scale behaviour change in addressing the climate crisis.



Bryan Rollins

Advisor: Product

Bryan is currently the Operator-In-Residence at Grok Ventures. He has worked in new technology ventures his entire career and was the former General Manager of Jira at Atlassian. He’s an expert product manager, and has previously founded his own company. Bryan is passionate about working with companies like One Small Step who are using tech to help combat climate change in Australia.


Jason Serafino

Advisor: Tech

Jason is an experienced product and technology leader who is passionate about helping businesses achieve breakthrough innovation and growth. He previously held senior executive roles in financial services and has founded several companies. Currently, Jason works as the CTO of fin tech company, Credit Clear. As One Small Step’s tech advisor, Jason brings his knowledge in launching products & scaling high performing technology teams.