• Yoga Suryanegara
    Exploration and Resource Manager

    B.Eng (Geology)


  • Yoga Suryanegara is an Indonesian Geologist with International experience. Yoga has worked as a Senior Coal Geologist with Caledon Resources (underground mining experience with international standard) and has worked side by side with Pat Hanna at SRK Consulting as an Exploration and Resource Geologist. He has also been responsible for overseeing multi-million dollar exploration programs in Queensland and Kalimantan with more than 10 years experience in Berau Coal (fifth largest open cut thermal coal in Indonesia).

    Yoga is primarily involved with our Indonesian tenements and has a team of geologists who assist him from our office in Puruk Cahu, Central Kalimantan.

  • Yudhi Purwandi
    Government Relations Manager

    Bachelor of Social Science


  • Yudhi has 15 years experience in external relations which cover goverment relations, community relations, and stakeholders consultations. Previously, he worked at Rio Tinto‚Äôs Kelian Gold Mine during its mine closure period, continued with Mt.Muro Gold Mine, before joining Cokal in June 2013.At Cokal, Yudhi is responsible to make sure all permitting, compliances, and good relationships with Indonesian government in all levels (regency, provincial, and central) are fulfilled and maintained.