| Prof Dr | Sébastien | OWONA | University of Douala | Cameroon | Earth and Planetary Sciences | Pétrologie | Best Researcher Award | |
| Prof | Jianyong | Ouyang | National University of Singapore | Singapore | Materials Science | Thermoelectrics | Best Researcher Award | bestpaperawards.com |
| Assoc. Prof. Dr | Hend | Ouertani | Hôpital Militaire de Tunis/ Faculté de Médecine Dentaire/ Université de Monastir | Tunisia | Dentistry | Chirurgie Orale | Best Researcher Award | bestpaperawards.com |
| Dr | zeineb | ouerghi | university of Carthage | Tunisia | Chemistry | inorganic | Best Researcher Award | |
| Dr | Omar | Otoom | Hychem | Australia | Engineering | Structural Engineering | Best Researcher Award | bestpaperawards.com |
| Mr | Geoffrey | Otim | SynBio Africa | Uganda | Biochemistry, Genetics and Molecular Biology | Synthetic Biology | Best Researcher Award | |
| Mr | Godfred | Osukuku | Pan African University for Life and Earth Sciences Institute (Including Health and Agriculture), PAULESI, University of Ibadan, Nigeria. | Kenya | Earth and Planetary Sciences | Petroleum Geoscience | Best Researcher Award | |
| Mr | Benjamin | Osei Tutu | Food and Drugs Authority | Ghana | Health Professions | Food Safety | Best Researcher Award | |
| Prof | Ludmila | Osadchuk | Federal Research Center ‘Institute of Cytology and Genetics’, The Siberian Branch of the Russian Academy of Sciences | Russia | Agricultural and Biological Sciences | Reproductive Physiology and Genetics | Most Reader's Article Award | |
| Dr | Juan Carlos | Ortega-Bravo | Center for Water Management and Technologies, University of The Frontier | Chile | Environmental Science | Water recovery | Best Researcher Award | |
| Dr | Kelly | Oriakhi | University of Kentucky | United States | Biochemistry, Genetics and Molecular Biology | Metabolic diseases | Best Researcher Award | |
| Mr | Boris | Oreshkin | Amazon | Canada | Energy | Electricity load forecasting | Most Reader's Article Award | |
| Assoc. Prof. Dr. | Şenol | Orakcı | AKSARAY UNIVERSITY | Turkey | Social Sciences | Education | Best Researcher Award | bestpaperawards.com |
| Dr | Cheen Sean | Oon | Monash University Malaysia | Malaysia | Engineering | Mechanical Engineering | Best Researcher Award | |
| Dr | Poh Choon | Ooi | Institute of Microengineering and Nanoelectronics, The National University of Malaysia | Malaysia | Energy | Piezoelectric Energy Harvester | Best Researcher Award | |
| Dr | Chukwuemeka | Onyimadu | UN Women | Nigeria | Economics, Econometrics and Finance | Public Financing for Climate Change | Most Reader's Article Award | |
| Mr | Philippe | Ondo Meye | Direction Générale de la Radioprotection et de la Sûreté Nucléaire, Gabon | Gabon | Physics and Astronomy | Radioprotection | Best Researcher Award | |
| Dr | Bedel Giscard | Onana Essama | University of Ebolowa/HTTTC of Ebolowa | Cameroon | Materials Science | nonlinear dynalics in metamaterials | Best Researcher Award | |
| Dr | Ameer .N | Onaizah | Beijing institute of technology | Iraq | Computer Science | Computer science, artificial intelligence and deep learning | Best Researcher Award | |
| Prof | Mohammed | Omran | Graduate School of Business, Arab Academy for Science and Technology | Egypt | Economics, Econometrics and Finance | Financial Economics | Best Paper Award | |