Alex Hetherington (BA MSc) is a leading
South African sustainability strategist. He is skilled in gearing companies to leverage benefit from their sustainability actions, ensuring triple (social, environmental and economic) bottom-line profit.

In addition, Alex is a founding member of the carbon management consultancy, Carbon Calculated, sustainable event company, TonneZero and a shareholder in sustainable development photographic archive, Earthstock.

Earth Stock

Earthstock is a specialist photographic archive dedicated to imagery of sustainable development. It is managed and commercially-driven through Africa Media Online.

Carbon Calculated

Carbon Calculated works with clients who have recognised the need to understand their carbon risks and opportunities and are willing to take up the challenge of accurately monitoring their carbon emissions and setting targets that are aligned to global scientific consensus. Alex is a founding member and provides CDP and science-based target services to the company.


TonneZero is a partnership between Carbon Calculated and environmental legal and systems firm, EcoImpact. The company has bought the ISO20121 sustainable event management system to South Africa. Alex is a founding member.