Strategist, investor and board advisor
Assheton Stewart Carter is an impact investor, strategist and board advisor with more than 30 years of experience spanning London financial markets, global sustainability leadership, standards-setting and complex international supply chains. He is Executive Chair and Founder of TDi Sustainability, founder of The Impact Facility and co-founder of the Fair Cobalt Alliance.
Assheton brings a rare combination of boardroom credibility and operational depth - having worked across business, NGOs, development finance and government to build public-private partnerships, traceable supply chain initiatives and responsible capital platforms. His work sits at the intersection of responsible investment, critical minerals, sustainability standards and resilient supply chains, making him a trusted voice for conferences, senior leadership teams and boards that need credible, commercially grounded insight.
Career timeline
40 years spanning institutional finance in London, global sustainability leadership, and boardroom influence.
Co-founder and Strategic Advisor, Fair Cobalt Alliance
Helped formalise small-scale mining in critical mineral supply chains in Central Africa through collaborative industry action.
Founder, Board of Trustees and CIO, The Impact Facility
Built an impact investment platform focused on demonstrating the community economic development potential of mineral development.
Founder and Executive Chair, TDi Sustainability
Leads TDi Sustainability, advising corporates, development institutions, private equity and governments on responsible growth, access to markets and sustainable value chains.
Impact investing and risk leadership
Head of Project Risk and Performance at Althelia Ecosphere, shaping investment discipline in natural resources and REDD+ solutions.
Board and standards leadership
Held senior board and advisory roles across standards bodies, NGOs and industry initiatives, including AccountAbility, Equitable Origin, Responsible Jewellery Council and the Copper Mark.
Responsible supply chains at scale
Senior Vice President, Corporate Engagement at Pact, while also helping build traceable gold and diamond jewellery supply chains with Walmart's LoveEarth initiative.
Global sustainability and corporate engagement
Chief Advisor at Conservation International, leading strategy across energy and mining, with a focus on biodiversity, environmental leadership and business engagement.
Academic and research leadership
Research roles at the Universities of Bath and Warwick and Warwick Business School established his deeper strategy and sustainability expertise.
Expanded leadership beyond finance
Personnel and Project Director roles, production management in Madrid, and independent consultancy work broadened his operating experience across different sectors and geographies.
Entered financial markets
Portfolio Manager and then Salesman to Institutional Financial Clients at Hoare Govett, building a foundation in capital markets, client advisory and investment judgment.
Gallery
Keynote speaking
Critical minerals keynote speaker & conference panellist
Assheton speaks at leading international conferences on critical minerals strategy, responsible sourcing, ESG risk, and the clean energy transition.
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Board advisory & non-executive director services
With 30+ board positions across critical minerals, mining, and sustainability, Assheton brings deep sector expertise and independent strategic counsel to boards.
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