Loke Cherng Huei
Operation Director

Mr. Loke, BE, has 36 years of engineering and project development experience in SE Asia. Mr Loke is a Director of BBM.

Mr Loke joined Cokal from Desaria Holding Sdn Bhd, Malaysia, project luxurious apartment in Kuala Lumpur Malaysia. He has 8 years mining experience as site mining manager, manage civil & structural works for industrial plants include offshore loading facilities structure, open cast coal mining contractor for overburden works, coal extraction and construction. Mr Loke has above 20 years in civil contruction and oil palm plantation.

Luki Wilianto
Geology Manager
Luki Wilianto joined Cokal from PT. Thiess Contractors Indonesia. Luki has been working in the Indonesian Coal Mining industry for over 15 years and has significant experience in the field of Geology and Mining.  Having worked for PT Thiess Contractors Indonesia, PT Britmindo (Mining Consultant) and PT Wahana Baratama Mining (Bayan Resources Group).
During this time, he has either managed or contributed significantly to numerous due diligences, design and supervision of coal exploration programs, and mining studies related to the geological modelling, estimation, assessment, evaluation, mine planning and report accordance with JORC Code and KCMI for numerous Indonesian coal mining companies.
Mr. Luki graduated from UPN “Veteran” University of Yogyakarta, Indonesia, majoring in Geological Engineering, is a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM) and an Indonesian Competent Person of “Ikatan Ahli Geologi” (CPI-IAGI).
Muhamad Arie Cahyono
Mine Planner Manager
Muhamad Arie Cahyono joined Cokal from PT. Thiess Contractor Indonesia. Arie has 15 years mining experience including coal geological modelling and mine planning. Having worked in PT Thiess Contractors Indonesia, PT Britmindo (Mining Consultant) and PT Bayan Resources Tbk where he was responsible to develop a life of mining plan among of company projects.
He worked in all aspects of the mining operation including validating geological models, developing pit and dump designs and dewatering strategies and ensuring mining contractors adhered to the company’s mine plans. He is an expert user of mining and geological modeling software used by Cokal and is competent to evaluate resources and reserves.
Mr. Arie is a member of PERHAPI and registered as Competent Person Indonesia (CPI).
Tee Kok Hui
Surveyor Manager
Tee Kok Hui joined Cokal from Island and Partners Sdn Bhd. Tee has 41 years’ experience in many aspects of the construction industry. For Cokal he is managing the survey teams preparing the data for road, port and mine design.
Andhi Yulianto
Jetty Superintendent

Mr. Andhi Yulianto Joined Cokal From PT. bara Indah Sinergi Where he was Project Engineer on Coal mining in Kalimantan. He has 16 years experience with 12 years in mining Building facility & infrastructure project.
Mr. Andhi Yulianto Graduated from Muhammadiyah Malang University, majoring in Civil Engineering, His job at Cokal is to be in charge of the technical construction of Jetty infrastructure and Mining Facilities.