Apr 28, 2026
Panelists Revealed for ASGM Session
LBMA are pleased to confirm an expert panel for Session 6: Finding Solutions & Positive Outcomes – Artisanal & Small-Scale Gold Mining (ASGM), taking place from 12:00–13:00 on Thursday, 18 June as part of the LBMA/WGC Sustainability & Responsible Sourcing Summit. Together, the panel will explore practical solutions, collaboration across the supply chain, and how industry stakeholders can drive meaningful, positive impact while strengthening confidence in responsibly sourced gold.
Moderator: Gregory Mthembu-Salter, LBMA Consultant
Gregory is Director of Phuzumoya Consulting and has worked on the political economy of Artisanal and Small scale Mining (ASM) for nearly 30 years, including as a member of the UN Group of Experts on the DRC. Since 2022, he has worked with LBMA to support the integration of responsibly sourced ASM gold into the Good Delivery List, drawing on extensive field experience across Africa, Latin America and Southeast Asia. He is also an author researching a forthcoming book on the DRC.
Terance Nkosi, Rand Refinery
Terance is Chief Technical and Sustainability Officer at Rand Refinery, where he leads the organisation’s ESG strategy and technical assurance. With more than two decades of experience at the refinery, he has held senior leadership roles across smelting, SHEQ and sustainability, and brings deep expertise in metallurgy, environmental sciences and ethical leadership. He is widely recognised for his contribution to advancing responsible and sustainable industry practices.
Diana Culillas, SBGA
Diana is CEO of the Swiss Better Gold Association, leading a pioneering network of industry and finance partners supporting the sustainable development of artisanal and small scale gold mining. With a background spanning humanitarian work with the ICRC and 14 years across Africa, Asia and the Middle East, she later spent a decade at Chopard Group overseeing responsible sourcing, environmental and philanthropic initiatives. She now focuses on building responsible gold value chains from ASM producers to end markets.
You can read about our panelists in more detail on our Agenda page.