Meet the Team

Assheton Carter

Executive Chair and Founder

Assheton is an expert on responsible sourcing, sustainability standards, environmental markets, non-financial risk, and responsible investment. He has more than 30 years of experience focusing on the international supply chains of mining, metals, and gemstones,…

Dave Crew

Chief Executive Officer

With more than 20 years of experience in business growth and organisational transformation, Dave Crew leads TDi Sustainability as CEO. An experienced entrepreneur with a PhD in Business Administration and a Master’s in Economics, Dave…

Julija Menise

Senior Vice President

Julija specialises in developing frameworks and standards that enhance supply chain transparency and ESG compliance. She has extensive on-site audit and assessment experience ranging from mining and smelting to manufacturing and retail, carried out in…

Soledad Mills

Senior Vice President

With more than 20 years of experience in the ESG space, Soledad is a sought-after advisor, facilitator and thought leader on strategies, standards, and best practices in responsible sourcing and sustainable development.

Hayley Flack

Chief Operations Officer

Hayley excels in the development, implementation and monitoring of day-to-day operational systems and processes. She has the vital task of developing TDi’s policies and standards, fostering a inclusive and productive environment that enables the team…

Tapiwa Chinowaita

Chief Technology Officer

Tapiwa leads the development and commercialisation of cutting-edge digital platforms focused on enabling responsible sourcing through actionable ESG data.

Calvin Laing

Head of Data and Due Diligence

Calvin is a data and due diligence professional, with more than 15 years of experience leading human rights, social and environmental initiatives across diverse global contexts.

Maryam Babba

Multi-stakeholder Manager

Maryam Babba is an experienced multidisciplinary consultant with extensive expertise encompassing applied science, clinical research, and drug development. Maryam leads TDi’s work as project management office on the CiPPPA initiative.

Sarah Wilkinson

Marketing Manager

Sarah has more than 20 years’ of experience in communications and marketing, with particular experience in the biodiversity conservation, agriculture, forestry and academic publishing sectors.

Raphael De Perlinghi

Head of Business Development

Raphael has a passion for sustainable innovation, and has worked for more than two decades in the technology sector, holding senior leadership roles with global tech giants.

Donna Smith

Financial Controller

Donna has more than 15 years of experience working in the financial service experience. She is passionate about sustainable practises and human rights issues and believes that making small incremental changes in our personal and…

Clara Segón

Standards Manager

Clara has more than 15 years of international experience in improving the sustainability of extractive industries, from performance minerals to biomass and, more recently, the jewellery value chain.

Joséphine Quioc

Senior Sustainability Consultant

Joséphine Quioc is an accomplished sustainability professional with extensive experience in mineral responsible sourcing audits and supply chain sustainability. She is a subject matter expert in mineral due diligence, ESG standards and chain of custody…

Kaki Comer

Sustainability Consultant

Kaki leads on TDi’s ESG and business sustainability projects, with a particular focus on the renewables sector and community relations work. Kaki divides her time between TDi and Equitable Origin, where she works on Indigenous…

Zandi Moyo

Associate Sustainability Consultant

Zandi has a background in quantitative and qualitative research, contributing to TDi’s analytical research assignments, and to responsible sourcing and data projects, which includes mapping mineral and agricultural supply chains, conducting research on their ESG…

Jeannette Greven

Senior Sustainability Consultant

Jeannette’s background is in international development and qualitative research in conflict-affected areas. At TDi, Jeannette works on projects that range from responsible sourcing strategies to engagement with artisanal mining communities.

Michael Wittgreffe

Lead Software Engineer

Michael has more than ten years’ experience as a software engineer. At TDi he focuses his extensive experience on the development of digital tools, toolkits and online platforms for our clients.

Veronique Appels

Resource Project Manager

Veronique has 19 years of experience in Business Analysis and Project Management within the Information Technology sector, with a proven track record of delivering results across a wide range of industries, including mining, IT, financial…

Lesley Jansen Van Vuuren

Executive Assistant

Lesley Jansen Van Vuuren has more than a decade of experience in administrative support, operations management, and strategic coordination.

Kristy Jooste

Content Specialist

Kristy is a storyteller and strategist specialising in creative content production, copywriting and journalism.

Sunil Abeyasekera

ESG Consultant

Sunil has an extensive background in responsible sourcing, with a focus on traceability, standards and certifications, benchmarking, due diligence, risk assessment, strategy and stakeholder engagement.

Arianna Fabri

Associate Consultant

Arianna has a background in international affairs, tech and logistics. At TDi she focuses on the mapping of supply chains of key minerals and metals products to support the implementation of responsible sourcing and due…

Eduardo Zanatta

Senior Analyst

Eduardo has a diverse background spanning environmental research, quality management, and ESG data analysis and reporting.

Barbara Kyling

Senior Analyst

Barbara works on projects that assist companies and organisations to make informed decisions by integrating ESG risks and making a positive impact at multiple system levels.

Michael Hayek

Senior ESG Analyst

Michael has an extensive background in risk assessment, analysis, and risk management of mineral supply chains, with a particular focus on 3TG and cobalt. His expertise extends to designing material flows and implementing digital traceability…

Rajalakshmi Gopalakrishnan

ESG Analyst

Rajalakshmi has dedicated most of her career to working in improving circularity in different waste streams in India and UK. She has also been involved in greenhouse gas emissions estimations and building SDG frameworks for waste…

Yetta Lin

ESG Analyst

Yetta is a corporate sustainability management professional with expertise in carbon accounting, ESG reporting and project management.

Katia Solar

Program Coordinator

Katia has more than ten years of experience in providing support on marketing, administration and general project coordination within Latin America.

Kyrone James

Full Stack Developer

Kyrone is a dedicated full-stack developer who combines technical expertise with a passion for building impactful solutions. At TDi, Kyrone contributes to creating scalable digital tools that enhance supply chain transparency and support responsible sourcing…

Luke Ashton

ESG Analyst

Luke is a sustainability professional with a multidisciplinary background in environmental science, stakeholder engagement, and circular economy systems.

Channan Sangha

ESG Analyst

Channan is an ESG Analyst at TDi Sustainability, based in the UK. With an interdisciplinary background and experience spanning sustainability consulting, policy, research, and advocacy, she brings analytical rigour and creative thinking to complex sustainability…

Eric Carter

Junior ESG Analyst

Eric works on risk identification within mineral supply chains and assesses and benchmarks ESG standards within mineral and metal value chains to ensure risks are appropriately mitigated

Thabang Ramaano

Senior Developer

Thabang Ramaano is a full-stack web developer with over a decade of experience delivering scalable, user-focused digital solutions across diverse industries.

George Chakama

Full Stack Developer

George Chakama is a visionary developer dedicated to building meaningful digital experiences across web and mobile platforms.