Our Team

Rupert Davis
Managing Partner

Rupert founded the firm in 2009 - to find and place the world's best business orientated sustainability leaders in positions of maximum impact.

Prior to Sustainable Means his career included C-Suite Executive Search (Heidrick & Struggles), Investment Banking (JP Morgan) and Sustainability Entrepreneurship (3 start-ups from inception to profitability).

Rupert graduated from the University of Cambridge highest in his class (top first), winning the University Bronowski Prize in Natural Sciences in 1992. He trained on Wall Street and subsequently returned to the United States in 1998 as a Fulbright Scholar, researching responsible business and the psychology of altruism.

Passionate about ecological economics, Rupert took direct climate change action prior to undergraduate studies, spending several years developing micro-renewables and silviculture to help preserve rainforest and reduce climate impact in the APAC region.


He has spent >30 years puzzling over how to create an economy and a form of capitalism that is genuinely sustainable and supportive of life and human flourishing over the long term.


Barney Walker
Head of Research

Dr. Barney Walker is Head of Research at Sustainable Means and leads our work with senior ESG specialists in the advisory and financial sectors. In addition he coordinates key practice build-outs and team lifts, and places Partner-level Practice Leaders at fast growth consultancies. Barney combines his subject matter expertise in sustainability and future economy with the analytical rigor of his scientific training to deliver high quality and impactful results for our clients.


Previously, Barney was an EU-sponsored Research Fellow at MIT working at the interface between cleantech, smart materials and 'blue skies’ research. Barney obtained his PhD in Nanotech/Organic Chemistry from the University of Edinburgh. He is the author of 15 peer reviewed scientific publications and has been invited to speak at numerous international conferences including the US National AAAS “Science without Borders” conference, Washington DC in 2011. He has also previously advised on the implementation of renewable energy technologies and materials for government enterprise, green start-ups and regional cooperatives.


He currently lives in New Zealand with his young family and enjoys surfing empty west coast waves and spending time at his family's solar powered ‘bach’ in the mountains.

© 2017 by Sustainable Means