Eko Arief R Budiarto has extensive experience in the mining industry, currently serving as Superintendent UG Shallut Project at PT Nusa Halmahera Minerals since November 2011. Key responsibilities include preparing large project tenders, conducting cost analyses, overseeing technical studies, and managing development excavation plans and reports. Previously, Eko held the roles of Superintendent - Drill & Blast and Assistant Superintendent - Ventilation/Drill & Blast, where tasks involved leading critical blasting projects, reviewing ventilation reports, and ensuring safety compliance. Eko also has a solid background in stope design and ventilation engineering from positions at AEL Mining Services and Freeport Indonesia and has an educational foundation in mining engineering from UPN "Veteran" Yogyakarta.