Ekwe-Testimony, Nnenna holds a Master of Science degree in Petroleum Geosciences and is currently pursuing a doctoral degree in Environmental Geochemistry. During her master's program, she led the assessment of reservoir quality of the Nena field, located in the Onshore Niger Delta. She serves as a Junior Lecturer in the Department of Geology, at the University of Nigeria, Nsukka, where she teaches undergraduate courses in Environmental Geochemistry. Her current research focuses on the assessment of environmental degradation resulting from petroleum and solid mineral mining, as well as optimization of eco-friendly remediation techniques that promote circular economy.