Horizonte Minerals Plc announced that Maryse Bélanger, interim Chief Operating Officer of the Company will step down as COO effective 21 February 2024, following a period of handover to Graham Crew, who is appointed as new interim COO. Mr. Crew was Chief Technical Officer of La Mancha Resource Capital LLP ("La Mancha"), which advises La Mancha Resource Fund SCSp, one of the Company's major shareholders. Mr. Crew has been on a period of secondment to the Company in recent months having stepped down from his day-to-day executive role within La Mancha.

He was previously a Non-executive Director at Golden Star Resources Limited before becoming Chief Operating Officer. He has extensive operational experience in Australia, Africa and Asia and was previously Operations Manager for La Mancha Resources Australia, including the development and construction and ramp up of the Mungari processing facility, prior to the divestment of those assets to Evolution Mining. He began his career with Western Mining Corporation at Olympic Dam and Leinster Nickel Operations.

He holds a B.Eng (Mining Engineering) from the West Australian School of Mines, is a Member of the Australian institute of Corporate Directors and a Fellow of the Australasian Institute of Mining & Metallurgy.