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Riffansyah Djuhari is a seasoned mechanical engineering professional with extensive experience in project engineering and supervision. Currently serving as a Field Mechanical Supervisor at Freeport Indonesia since March 2022, Riffansyah previously held the position of Mechanical Project Engineer at PT Amman Mineral Nusa Tenggara from May 2018 to March 2022, where responsibilities included overseeing project execution and ensuring timely and compliant delivery of materials and services. Earlier roles include Project Engineer at Petrosea and PT Indo Tambangraya Megah, Tbk, where Riffansyah focused on project execution, site installation, and mechanical engineering inspections. Commencing a career as a Support Engineer in the Mining Division at KORINDO Group, Riffansyah provided technical support and problem-solving solutions related to design and manufacturing processes. Riffansyah holds a Bachelor's degree in Mechanical Engineering from Institut Teknologi Nasional (ITENAS).