Octaviani, Bella Puspa, PT Bara Tabang (Bayan Group) (Indonesia)
Octavya, Putri Elma, Direktorat Teknik dan Lingkungan Mineral dan Batubara, Kementerian ESDM (Indonesia)
Octavya, Putri Elma, General Directorate of Mineral and Coal, Ministry of Energy and Mineral Resources (Indonesia)
Octavya, Putri Elma, Unit of Mining, PT. Semen Indonesia (Persero) Tbk; 2General Directorate of Mineral and Coal, Ministry of Energy and Mineral Resources
Oktantyo, Gumilang (Indonesia)
Oktariansyah, Iwan, PT. TIMAH, Tbk. (Indonesia)
Oktavianto, Hanung, Departemen Geotechnical & Hydrogeology PT Adaro Indonesia (Indonesia)
Oktavianto, Hanung, Departemen Geotechnical & Hydrogeology PT. Adaro Indonesia (Indonesia)
Oziana, Deea Rizki, Program Studi Teknik Pertambangan, Universitas Syiah Kuala (Indonesia)

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