Denny Lesmana has extensive experience in the mining and geology sector, currently serving as General Manager at PT Nusa Halmahera Minerals since November 2005, with previous roles including Deputy General Manager Operation and Acting Minerals Manager. Denny's expertise encompasses the development and maintenance of systems for safe and efficient open cut and underground Mine Geology operations at Gosowong, along with managing geological risks. Prior experience includes roles at Newcrest Mining and PT. Bumi Makmur Selaras, where responsibilities included exploration and geological data interpretation. Denny holds a Bachelor's degree in Geology from Universitas Padjadjaran, a Diploma in Frontline Management, a Master's degree in Management from Universitas Khairun Ternate, and recently completed Professional Education in Engineering at Universitas Hasanuddin.