Nnaemeka is a Postdoctoral Research Fellow at UQ Business School. Before joining the UQ Business School, Nnaemeka was a Postdoctoral Research Fellow at UTAS where he worked on the Tasmanian Energy Consumer Engagement project which examined consumer acceptance and preference for renewable hydrogen. Also, he was a Science Policy officer at the Australian Academy of Science where he worked on "The Risks to Australia of a 3 degree Warmer World". Nnaemeka is a non-residential Senior Research Fellow (unpaid) at the Centre for Climate Change and Development where he makes contributions to the Deep Decarbonisation Project for Nigeria. He is a Visiting Lecturer in the Department of Economics & Development Studies at Covenant University, Ota, Nigeria. Nnaemeka is an Associate Editor (Environmental Economics and Management) at Frontiers in Environmental Science and has authored/co-authored over 38 journal papers and conference papers, book chapters, a monograph, research contract reports and media publications.