| Name | Membership No. | Grade | Branch |
|---|---|---|---|
| Babatunde Olatokunbo Odebunmi | SE 0506 | Member | – |
| Japhet Bolajoko Oderinde | SE 0142 | Member | Lagos |
| Clifford Aideloje Odiai | SE 0608 | Member | Benin |
| Raphael C Odumodu | SE 0049 | Member | Enugu |
| H O Odumosu | SE 0122 | Fellow | Lagos |
| K. O. Odumuyiwa | SE 0352 | Fellow | Lagos |
| Henry Adeyemi Oduntan | SE 0672 | Member | Lagos |
| Lateef Salami Oduntan | SE 0374 | Member | Lagos |
| Rotimi Olumide Oduola | SE 0466 | Member | Ibadan |
| Donatus Chukwunenye Oduopara | SE 0815 | Member | Lagos |
| Modupe Oluwakemi Odusanya | SE 0561 | Member | Abuja |
| Olutade Akintobi Oduyale | SE 0353 | Member | Lagos |
| Obinna Oliver Ofokansi | SE 0566 | Member | Enugu |
| Olatokunbo Margaret Ofuyatan | SE 0886 | Member | – |
| Vincent O. I. Ogbeide | SE 0154 | Fellow | Lagos |
| Doghogho Ogbeifun | SE 0470 | Member | – |
| Aka Ogbobe | SE 0028 | Fellow | Enugu |
| Godwin Ogeneke | SE 0646 | Member | Lagos |
| Olukayode Adeniyi Ogunbanjo | SE 0354 | Member | Lagos |
| Bolaji Olumide Ogunbase | SE 0266 | Member | Lagos |
| Omotayo Peter Ogunbiyi | SE 0204 | Member | – |
| Adewale O. Ogundalu | SE 0355 | Member | Lagos |
| Olushola Babatunde Ogundalu | SE 0396 | Member | Lagos |
| Francis Obisesan Ogundare | SE 0320 | Member | Ibadan |
| Akinsanmi Oluwayanmife Ogundari | SE 0747 | Member | Lagos |