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He will be based in Medellin, with particular focus on advancing Metminco's portfolio of gold assets in the Quinchia district.
Winer has over 30 years' experience in gold and base metals in South America, holding a number of senior exploration management roles.
A relevant role is that of VP exploration for AngloGold Ashanti Colombia where he led the exploration team that discovered the Nuevo Chaquiro copper-gold porphyry deposit in the Mid-Cauca belt.