Oluwajana Stephen Oluyemi is an Academic Technologist in the Department of Science Education, University of Lagos. He holds degrees in Chemistry and Environmental Management and a Certificate in Learning Evaluation from the University of Illinois, USA. He is an Associate Member of the Nigerian Institute of Science Laboratory Technology (NISLT). His research interests focus on water quality analysis, particularly groundwater studies, including investigations around the Oke-Afa dumpsite in Okota, Lagos. He has analysed and characterized numerous water samples across Lagos State.