| Dr | Chinedu | Okeke | University of Abuja | Nigeria | Health Professions | Clinical research | Best Researcher Award | View Profile |
| Dr | Karinate | Okiy | Federal University of Petroleum Resources | Nigeria | Chemical Engineering | Renewable/Sustainable Energy | Research Excellence Award | View Profile |
| Dr | Kohei | Okuyama | UT MD Anderson Cancer Center | United States | Medicine and Dentistry | Oral Cancer and Saliva Metabolism | Best Review Article Award | View Profile |
| Dr | Temitayo | Oladimeji | Covenant University | Nigeria | Engineering | Environmental | Best Researcher Award | View Profile |
| Prof | Wieslaw | Oleszek | Institute of Soil Science and Plant Cultivation, State Research Institute | Poland | Agricultural and Biological Sciences | Phytochemistry, plant protection | Best Researcher Award | View Profile |
| Dr | Alexis | Oliva | Universidad de La Laguna | Spain | Pharmacology, Toxicology and Pharmaceutical Science | Tecnología Farmacéutica | Best Researcher Award | |
| Dr | Ubirajara | Oliveira | UFMG | Brazil | Environmental Science | Wilfire | Best Researcher Award | |
| Mrs | Mozaniel | Oliveira | Museu Paraense Emílio Goeldi | Brazil | Chemistry | Natural Products | Best Researcher Award | |
| Dr | Konul | Omarova | Baku Business University | Azerbaijan | Mathematics | Probability theory and mathematical statistics | Best Research Article Award | View Profile |
| Mr | Akinyemi | Omoniyi | Ahmadu Bello University, Zaria, Nigeria | Nigeria | Immunology and Microbiology | Vaccine and Drug Discovery and Design | Best Researcher Award | |
| Dr | Abd El-Fattah | Omran | ERI | Egypt | Engineering | Renewable energy | Best Researcher Award | View Profile |
| Mr | Samuel Kwasi | Opoku | N/A | Germany | Other | Public Health Scientist/ Clinical Researcher | Best Paper Award | View Profile |
| Mr | Mehmet | Orhan | American University of Sharjah | United Arab Emirates | Engineering | Mechanical Engineering | Most Cited Author Award | |
| Ms | CEMRE | ORHAN | I.D. Bilkent University | Turkey | Social Sciences | Museum Soundscapes | Most Cited Article Award | |
| Prof | Victor | Orlov | Department of Higher Mathematics, Moscow State University of Civil Engineering | Russia | Mathematics | Нелинейные дифференциальные уравнениня с обычной и дробной производной. | Best Review Article Award | View Profile |
| Dr | Zahra | Orouji | Department of Mathematics, Urmia University, Urmia 5756151818, Iran | Iran | Mathematics | complex analysis | Best Paper Award | View Profile |
| Assoc. Prof. Dr | Muhammad Murtadha | Othman | Universiti Teknologi MARA | Malaysia | Engineering | Power System | Best Researcher Award | |
| Dr | Jean Claude W. | Ouédraogo | Université Joseph KI-ZERBO | Burkina Faso | Chemistry | Chimie Organique | Best Researcher Award | View Profile |
| Dr | MARK | OWUSU ADJEI | Nanjing Forestry University | China | Biochemistry, Genetics and Molecular Biology | Plant | Research Excellence Award | View Profile |
| Prof | Fazilet devrim | Özdemirhan | bolu abant izzet baysal university department of chemistry | Turkey | Chemistry | aSYMMETRİC SYNTHESİS | Most Cited Article Award | |