| Doctor Olalekan  Onisuru POSTDOCTORAL FELLOW
 | School of Molecular And Cell Biology | olalekan.onisuru@wits.ac.za | 0117179999 | 
| Doctor Hope  Onohuean ASSOCIATE LECTURER
 | Pharmacy | hope.onohuean@wits.ac.za | 0117171389 | 
| Doctor Raymond  Onuoha POSTDOCTORAL FELLOWSHIP
 | Wits Institute For Social & Economic Research | raymond.onuoha@wits.ac.za | 0117174272 | 
| Doctor Christopher  Onyeneke POSTDOCTORAL FELLOWSHIP
 | School of Architecture and Planning | christopher.onyeneke@wits.ac.za | 0117177652 | 
| Doctor Nnaemeka  Onyeuwaoma RESEARCHER
 | School of Geosciences | nnaemeka.onyeuwaoma@wits.ac.za | 0117179999 | 
| Doctor Chioma Obiageli  Onyia LECTURER
 | Psychiatry (Sterkfontein Hospital) | chiomaobiageli.onyia@wits.ac.za |  | 
| Doctor Meera  Ooka LECTURER
 | Paediatrics & Child Health (Johannesburg Hospital) | Meera.Ooka@wits.ac.za | 0114880000 | 
| Doctor Aylin  Oommen Jose ASSOCIATE LECTURER
 | Psychiatry (Sterkfontein Hospital) | aylin.oommenjose@wits.ac.za | 0760441238 | 
| Doctor Ane  Orchard SENIOR LECTURER
 | Pharmacy | ane.orchard@wits.ac.za | 0117172317 | 
| Doctor Gaitree  Oree ASSOCIATE LECTURER
 | Paediatrics & Child Health (Coronation Hospital) | gaitree.oree@wits.ac.za | 0114709284 | 
| Doctor Chibueze  Orji POST DOCTORAL FELLOW
 | Wits School of Education | chibueze.orji1@wits.ac.za | 0117173766 | 
| Doctor Oscar  Ortega Montero POST DOCTORAL FELLOWSHIP
 | Wits Institute For Social & Economic Research | oscar.ortega@wits.ac.za | 0117174272 | 
| Doctor Dennis  Osei REGIONAL LEAD RESEARCHER
 | African Philanthropy Centre | dennis.osei@wits.ac.za | 0117179999 | 
| Miss Nana Akua  Osei-Kuffour ASSOCIATE LECTURER
 | General Surgery (Johannesburg Hospital) | nanaakua.osei-kuffour@wits.ac.za | 0117172000 | 
| Doctor Muhammad  Osman ASSOCIATE LECTURER
 | Internal Medicine (Chris Hani Baragwanath Hospital) | muhammad.osman1@wits.ac.za | 0117172000 |