Mangasa Siregar is a seasoned professional with extensive experience in the mining sector, currently serving as the Manager of Operational Readiness for the Indonesia Growth Program at PT. Vale Indonesia Tbk since June 2019. With expertise in Engineering Project Management, Risk Management, and Occupational Health and Safety, Mangasa has a solid track record in the technical assessment of nickel laterite deposits and strategic business development. Previous roles include Geology Specialist at Vale, Manager for Grade/Ore Quality Control at PT International Nickel Indonesia, and various positions in geology and mineral resource inventory. Mangasa holds a Master’s degree in Industrial and Systems Engineering from Institut Teknologi Sepuluh Nopember Surabaya and a Bachelor's degree in Geology from Institut Teknologi Bandung.
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