| Assoc. Prof. Dr. | Şenol | Orakcı | AKSARAY UNIVERSITY | Turkey | Social Sciences | Education | Best Researcher Award | bestpaperawards.com |
| Mr | Boris | Oreshkin | Amazon | Canada | Energy | Electricity load forecasting | Most Reader's Article Award | |
| Dr | Kelly | Oriakhi | University of Kentucky | United States | Biochemistry, Genetics and Molecular Biology | Metabolic diseases | Best Researcher Award | |
| Dr | Juan Carlos | Ortega-Bravo | Center for Water Management and Technologies, University of The Frontier | Chile | Environmental Science | Water recovery | 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 | |
| Mr | Benjamin | Osei Tutu | Food and Drugs Authority | Ghana | Health Professions | Food Safety | Best Researcher Award | |
| Assoc. Prof. Dr | Dr.Goddy | Osimen | COVENAT UNIVERSITY, OTA-NIGERIA | Nigeria | Social Sciences | Social Sciences | Research Excellence Award | bestpaperawards.com |
| 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 | Geoffrey | Otim | SynBio Africa | Uganda | Biochemistry, Genetics and Molecular Biology | Synthetic Biology | Best Researcher Award | |
| Dr | Omar | Otoom | Hychem | Australia | Engineering | Structural Engineering | Best Researcher Award | bestpaperawards.com |
| Dr | zeineb | ouerghi | university of Carthage | Tunisia | Chemistry | inorganic | Best Researcher Award | |
| 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 |
| Prof | Jianyong | Ouyang | National University of Singapore | Singapore | Materials Science | Thermoelectrics | Best Researcher Award | bestpaperawards.com |
| Prof Dr | Sébastien | OWONA | University of Douala | Cameroon | Earth and Planetary Sciences | Pétrologie | Best Researcher Award | |
| Prof. Dr | Sunday Olayinka | Oyedepo | Bells University of Technology | Nigeria | Engineering | Mechanical Engineering | Best Researcher Award | bestpaperawards.com |
| Assoc. Prof. Dr | Gökhan | Özçelik | Karadeniz Technical University | Turkey | Decision Sciences | Optimization | Best Researcher Award | bestpaperawards.com |
| Dr | İsmail | Özen | Karadeniz Technical University | Turkey | Engineering | Mechanical, Automotive, Aircraft | Best Researcher Award | |
| Assist. Prof. Dr | Hurşide Kübra | Özkan Kunduracı | Ankara Yıldırım Beyazıt University | Turkey | Social Sciences | Child Development and Education | Best Researcher Award | bestpaperawards.com |
| Mr | Ali | Özsevinç | Tokat Gaziosmanpaşa University | Turkey | Chemistry | Polyurethanes, Controlled release, Textile, Nanomaterials | Best Researcher Award | |
| Prof Dr | Mehmet | Ozsoz | Near East University Northern Cyprus | Turkey | Chemistry | Electrochemistry , Biosensor | Best Researcher Award | |