Sébastien de Montessus
Sébastien de Montessus is a French mining executive known for his tenure as CEO of Endeavour Mining, where he played a pivotal role in expanding the company into one of Africa's largest gold producers. He was appointed Chief Executive Officer of Mansa Resources in January 2026, following a controversial departure from Endeavour Mining due to internal investigations into undisclosed payment instructions. His leadership at Mansa Resources is noteworthy as the company plans a significant investment in Liberia's Dugbe Gold Project, a major undeveloped gold asset in West Africa.
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Recent news mentions
Mansa Resources chief executive Sébastien de Montessus led the discussions focused on the future development of the Dugbe gold project.
Dugbe Emerges as a Potential Cornerstone of Liberia’s Mining Future | News
Liberia· 2026-06-26
Mansa Resources Chief Executive Officer Sebastien de Montessus reaffirmed the company's commitment to advancing the Dugbe Gold Project.
US$600M Dugbe Gold Investment Signals New Chapter for Mining Sector | NewsLiberia· 2026-06-22
Mansa Resources chief executive Sébastien de Montessus stated that the investment in the Dugbe Project is not just a mining investment but a broad economic stimulus for Liberia.
Mansa Resources, Liberia Deepen Cooperation Around Dugbe Gold Project | NewsLiberia· 2026-06-22Sébastien de Montessus was appointed as the CEO of Mansa Resources after a high-profile departure from Endeavour Mining.
Mansa Resources’ US$600 Million Investment and the Future of Liberia’s Dugbe Gold Project | CommentariesLiberia· 2026-06-20