| Dr | Omar | Maiga | IFPEN-HYDROMA | France | Earth and Planetary Sciences | Géoressources Hydrogène naturel | Best Researcher Award | |
| Assoc. Prof. Dr | Omar | Alhaj | University of petra | Jordan | Veterinary Science and Veterinary Medicine | Camel milk | Best Researcher Award | View Profile |
| Mr | Omar | Hazaymeh | Al-Balqa Applied University / Al-Huson University College | Jordan | Arts and Humanities | Applied Linguistics | Best Researcher Award | View Profile |
| Dr | Om Namha | Shivay | Vellore Institute of Technology, Chennai, India | India | Mathematics | Coupled themoelasticity | Young Scientist Award | |
| Mr | Oluwole Nurudeen | Omonijo | Central South University | China | Business, Management and Accounting | Business administration | Best Researcher Award | |
| Dr | Oluwafisayo | Ayodeji | Sydani Group, Abuja, Nigeria | Nigeria | Health Professions | Public Health | Best Researcher Award | |
| Dr | Oluwafemi Adeleke | Ojo | Landmark University | Nigeria | Biochemistry, Genetics and Molecular Biology | Computational Biology | Best Researcher Award | |
| Dr | Olugbenga | Ogunlabi | Olabisi Onabanjo University | Nigeria | Biochemistry, Genetics and Molecular Biology | Metabolism and cellular system | Best Researcher Award | |
| Dr | Oludunsin | Arodudu | State University of New York, College of Environmental Science and Forestry | United States | Environmental Science | Sustainability, Environmental health and Environmental justice | Best Researcher Award | |
| Dr | Oltiana | Petri | Faculty of Rehabilitation Science | Albania | Health Professions | Microbiology and Environment Science | Best Researcher Award | |
| Dr | Olja | Šovljanski | University of Novi Sad, Faculty of Technology Novi Sad | Serbia | Engineering | Biotechnology | Best Researcher Award | |
| Dr | Olivier | Materne | Standard de Liege | Belgium | Health Professions | Sports Medicine | Best Research Award | View Profile |
| Dr | Olivier | VOREUX | ONERA - The French Aerospace Lab | France | Materials Science | Mechanics of solid materials | Best Researcher Award | View Profile |
| Mr | Oliver Savio | Carlo | University of Salento | Italy | Environmental Science | Building and Environment | Young Scientist Award | View Profile |
| Prof Dr | Olga | Fink | EPFL | Switzerland | Engineering | Physics informed machine learning | Best Researcher Award | |
| Dr | Oleksandr | Maksymenko | Poltava State Medical University | Ukraine | Medicine and Dentistry | Morhology, Anatomy, Histology, Pediatric surgery | Best Researcher Award | |
| Mr | OKBA | FERGANI | University Mohamed Khider Biskra / University Of Bouira | Algeria | Energy | Optimization | Young Scientist Award | View Profile |
| Dr | OINDRILA | NATH | IIT KHARAGPUR | India | Earth and Planetary Sciences | ATMOSPHERIC SCIENCE | Women Researcher Award | |
| Assist Prof Dr | Oğuz Kağan | KÖKSAL | Adıyaman University | Turkey | Physics and Astronomy | Atomic and Molecular Physics | Best Researcher Award | |
| Dr | Ofem | Eteng | Federal University of Agriculture Abeokuta. | Nigeria | Biochemistry, Genetics and Molecular Biology | Biochemical Toxicology and Molecular Toxicology | Best Researcher Award | |