He had involved in more than 10 years wildlife research with specialization on hornbill ecology and wildlife management in multifunctional landscape, spatial planning and with more than 5 years’ experience in environmental sustainability issues for timber, oil palm and mining companies. He is also founder of Indonesia Hornbill Conservation Society, Director for Indonesian Ornithologist’s Union (2011-2016) and Co-Chairman of Asian Hornbill Network.
He graduated from University of Pakuan in 2000, majoring Biology and finished his Master of Science in Forest Resources, University of Georgia, United States in 2008. Now, he is an Associate consultant for AKSENTA and Re.Mark Asia Consultant, Jakarta, with expertise on environmental sustainability on High Conservation Value (HCV) framework. Yoki is now also active in various actions for Indonesia hornbill conservation.