Dr Temu is Chairman of Kumul Minerals Holdings Ltd. He was the Country Manager (PNG) for Barrick (Niugini) Limited (BNL) since June 2001, during which time he oversaw government relations, public affairs, and industry coalition management. Before this role, he was the Director of Corporate Affairs at Australia Pacific. Dr Temu holds a Bachelor of Economics from the University of Papua New Guinea, a Master of Agricultural Development Economics from the Australia National University, Canberra, Australia, and a PhD in Agricultural Economics from the University of California, Davis, USA.

Bonny currently serves as Chairman of Kumul Minerals Ok Tedi Limited and is a Director of the Kumul Minerals Holdings Limited Board. He is a lawyer by profession, has been admitted to the bar, and has been a senior legal practitioner for over 30 years. He holds a Bachelor of Laws Degree from the University of PNG, which he attained in 1987, and a Master of Laws (Corporate and Commercial) Degree from the University of Adelaide, which he attained in 1998. Postgraduate qualifications he has also attained include a Certificate in Legal Training from the Legal Training Institute in 1987 and a Certificate in Legal Drafting and Negotiation of Public and International Contracts from the University of London in 1994.

Marjella currently serves as a director of Ok Tedi Limited and is on the board of Kumul Minerals Holdings Limited. He has been a member of Kumul Minerals since October 2020, serving on the Finance and Investment Committees and in other Kumul Mineral subsidiaries. He holds qualifications from the Australian Institute of Management, a Bachelor's Degree in Geology from the University of Papua New Guinea, and a Master's Degree in Mining Engineering from the University of New South Wales. He is a Chartered Professional with the Australian Institute of Mining and Metallurgy and a Registered Engineer with the Board of Professional Engineers Queensland (RPEQ).