Sugeng Solihan, ST., IPM, has extensive experience in geology, currently serving as Senior Geologist at PT Nusa Halmahera Minerals since January 2011, focusing on underground mining operations at both Shallut UG and Toguraci UG Mines. Responsibilities include maintaining geological data, producing 3D structural models, and evaluating mining plans to meet production targets. Sugeng also owns CV. Queeny Baitul Akbar, established in November 2012, and has previously held positions such as Resources Development Geologist and Geotechnical Engineer at Pelsart Group, and Geoscientist at BHP. With a Bachelor's degree in Geology from Universitas Pembangunan Nasional Veteran Yogyakarta, Sugeng's career encompasses roles that emphasize resource development, geological evaluation, and operational coordination in mining environments.