Macellina is currently a Public Health Physician and a Senior Lecturer at the Obafemi Awolowo University (O.A.U), Ile-Ife, Nigeria. She holds a Bachelor of Medicine and Bachelor of Surgery (M.B.Ch.B) degrees from the O.A.U., Ile-Ife. In 2003, she was awarded a scholarship to pursue a Master of Public Health (MPH) degree by the Population & Reproductive Health Program (PRHP) of the OAU, Ile-Ife / Bill & Melinda Gates Institute for PRHP, JHU, Baltimore Partnership Program. After completion, she proceeded for residency training in Public Health and became board certified in 2010, having been awarded the fellowship of the West African College of Physicians in Public Health. During her graduate studies, her research interest focused on Reproductive Health, and she has published fairly well in the field, including her MPH dissertation on “Male Involvement in Family Planning in Ile-Ife”. At the completion of her residency training in 2011, Macellina opted for a career in academics. As a Lecturer in the Department of Community Health of the College of Health Sciences at the O.A.U, her work entails teaching and mentoring of both undergraduate and graduate students and different cadres of in-service health workers, research and community services. She is also O.A.U’s Faculty representative to Unilever Nigeria PLC. In that capacity she recruits campus ambassadors from OAU for Unilever. Her career goal is to become a distinguished academic and Public Health expert of national and global repute, contributing her quota to solving the many health and development problems of contemporary times through cutting edge research, community relevant services and mentoring of various categories of students.