Our Leadership Team

Mashudu serves as the Country Manager for Digby Wells South Africa. He earned an Honours Degree in Environmental Management from the University of Venda (South Africa) and is recognized as a Water Resource Scientist by the South African Council for Natural Scientific Professions (SACNASP). With over 12 years of experience in the Mining and Environmental sector, Mashudu has expertise in environmental assessments, specialized hydrological work, hydrological modeling, mine water management, water quality, water and salt balances, water conservation, demand and supply assessments, environmental/water resource audits, and EIA projects.His extensive project portfolio extends across diverse countries and regions, including South Africa, Mali, Ivory Coast, Senegal, Burkina Faso, DRC, Malawi, Tanzania, Botswana, and other parts of Africa. Prior to his role at Digby Wells, Mashudu spent 2 years contributing to the City of Johannesburg’s water and biodiversity unit, overseeing Catchment Management and Water Quality. As a director of Digby Wells South Africa, he actively contributes to the organization’s business strategy, business development, and overall growth.

André van Coller holds an MSc in Geohydrology from the Institute of Groundwater Studies, University of the Free State with specialisation in geochemistry. He has over 10 years’ experience in the mining and environmental industry working as a geologist, hydrogeologist and environmental geochemist. André has experience in the mining industry with water supply, dewatering, geochemistry, water and salt balance and EIA projects and played a role in both the project management, management of field programs, data processing and reporting. His current focus is on mine water management that includes surface water, groundwater and geochemistry assessments and management plans considering site wide impacts and mitigations. André is also the Divisional Manager for Water Services at Digby Wells and leads an international team of hydrologists, geohydrologists and geochemists. His international experience includes projects in USA, Canada, Peru, Dominican Republic, Pakistan, Sierra Leone, Liberia, Ghana, Mali, Ivory Coast, Senegal, DRC, Tanzania, Zambia, Namibia, Botswana, Zimbabwe, Mozambique, Malawi, Lesotho and South Africa.

With over 23 years of experience, Samba Sangare has worked in Mali for the Sadiola and Yatela Mines, Democratic Republic of Congo for the Kantaga Copper and Cobalt and Ashanti Goldfield Kilo SARL, as wells as in Guinee with the Société Anglo Gold Ashanti. Samba is the Country Manager for the Digby Wells Environmental Mali Office. He is an experienced Environmental Manager with strong leadership and stakeholder collaboration capabilities throughout the resources sector.

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Ms. Motlopi holds a BA, Environmental Science and Demography from the University of Botswana as well as a Masters in Natural Resources Management and Sustainable Agriculture from the Norwegian University of Life Sciences. She is a certified Principal Environmental Assessment practitioner registered with Botswana Environmental Assessment Practitioners Association (BEAPA). Ms Motlopi is also an Internal Lead auditor; ISO 14001:2015.Her over 15 years work experience covers Environmental Impact Assessment for Infrastructure projects, extractive and petroleum industries as well as Strategic Environmental Assessments and construction monitoring. It includes work within the climate change adaptation sphere focused on Vulnerability and Capacity Assessments for livelihoods’, Capacity building, Stakeholder Engagement and Resource Mobilisation. Ms Motlopi brokers knowledge within and across these sectors to aid responsible investment and influence national and regional policy. She has represented Botswana at UNFCCC Conference of Parties (COP) as a party delegate focusing on the Gender Agenda and Climate Action. Ms Motlopi’s experience extends beyond the borders of Botswana as she has been part of both regional and international projects in Namibia, South Africa and Europe. Prior to her role at Digby Wells, Motlopi spent 10 years as a Researcher within the climate change division at BITRI. As a Country Manager at Digby Wells Botswana, she leads the country’s business strategy and business development ambitions.

Morrison is an experienced metallurgist and environmental professional with more than 30 years’ experience across mining, processing, and regulatory sectors in Southern Africa. His career began with Zambia Consolidated Copper Mines, where he led gas handling and sulphuric acid plants before moving into senior process and concentrator roles in Botswana.He later served as Processing Manager at Discovery Metals and worked as a consultant on copper and acid plant projects in Zambia. At the Zambia Environmental Management Agency, Morrison held senior leadership roles including Director of Operations, overseeing regulatory compliance and climate change reporting.Since joining Digby Wells in 2025, he has been responsible for establishing and growing the Zambian office, drawing on his extensive technical expertise and proven leadership in both operational and environmental fields.

Barbara Wessels completed her B. Sc. in Geography and Environmental Management at the University of Johannesburg and has over 14 years’ experience. She is responsible for Group Technical Services which includes social and heritage, environmental management and compliance, GIS, ecology, air quality and noise, aquatic and wetland services, surface and groundwater as well as rehabilitation and closure. She has global experience in various environmental disciplines with a focus on integrated project management and compilation, review and auditing of Environmental and Social Impact Assessments.

Kirsten joined Digby Wells in November 2011 as a HR specialist. She has over 20 years HR generalist experience. She has experience in organisational development, job profiling, performance management, remuneration and reward, organisation structuring and design, and recruitment. Kirsten is also involved in the International travel procedures and Health and Safety for the organisation.

Pieter obtained a B.Eng. honours degree from the University of Pretoraia, and an Executive Masters in Business Administration from INSEAD. Pieter started his career in the coal mining industry where he commissioned and operated coal processing facilities. He then moved into the consulting industry where he designed coal, iron ore, mineral sands, gold and uranium processing plants. For the last decade Pieter has been involved in leading the mine closure transformation and sustainable business transformation of the mining industry in Africa, finding the overlap between financial viability and maximum possible environmental and social sustainability. Pieter was the Africa ESG Lead Partner for KPMG before joining Digby Wells and has a broad ESG and sustainability skillset covering compliance, financing, implementation and value creation.