| Mr | Obinna | Onodugo | Baylor University | United States | Engineering | Electric Machines and Drives | Research Excellence Award | View Profile |
| Prof | Francis | ONDITI | Riara University, Nairobi | Kenya | Social Sciences | Conflictology/ Peace and Conflict Studies | Best Researcher Award | View Profile |
| Mrs | Temitayo | Omoyeni | Cyprus International University | Nigeria | Engineering | Bioengineering/Biomedical Engineering | Best Researcher Award | View Profile |
| Mr | Oluwole Nurudeen | Omonijo | Central South University | China | Business, Management and Accounting | Business administration | Best Researcher Award | |
| Dr | Victor | Omollo | Kenya Medical Research Institute | Kenya | Health Professions | HIV prevention research | Young Scientist Award | |
| Assoc Prof Dr | Amir | Omidvar | Amir Omidvar/Shiraz University of Technology | Iran | Engineering | Mechanical Engineering/Renewable Energy and Thermal Comfort | Best Researcher Award | |
| Assoc Prof Dr | Aldo | Ometto | Universidade de São Paulo - USP | Brazil | Engineering | Engenharia de Produção - Engenharia da Sustentabilidade | Best Researcher Award | |
| Dr | Abdullah | Omar | Syrian Private university | Syria | Medicine and Dentistry | Pediatrics | Best Researcher Award | |
| Assoc Prof Dr | Bolutife | Olofinjana | Obafemi Awolowo University, Ile-Ife Nigeria | Nigeria | Physics and Astronomy | Materials Physics | Best Researcher Award | |
| Dr | Damien | Olivier | Universidad Autónoma de Baja California Sur | Mexico | Environmental Science | Ecología Marina | Best Researcher Award | View Profile |
| Dr | Julien | Olivet | Rega Institute/KU Leuven | Belgium | Biochemistry, Genetics and Molecular Biology | Epigenetics, HDAC, Cryo-EM | Young Scientist Award | View Profile |
| Prof Dr | Ricardo | Oliveira | Universidade de São Paulo/Faculdade de Ciências Farmacêuticas | Brazil | Agricultural and Biological Sciences | Microbiologia Aplicada | Best Researcher Award | |
| Dr | Keciany | Oliveira | Universidade Estadual do Ceara | Brazil | Health Professions | Nutrition | Young Scientist Award | |
| Mr | Willian | Oliveira | Federal University of Santa Catarina | Brazil | Agricultural and Biological Sciences | algae ecophysiology | Young Scientist Award | View Profile |
| Dr | Adela | Oliva Chavez | University of Wisconsin, Madison | United States | Agricultural and Biological Sciences | Entomology | Young Scientist Award | View Profile |
| Assist Prof Dr | Abdullah | Olimat | AL-balqa applied university | Jordan | Engineering | thermal science | Best Researcher Award | |
| Mr | Gamtesa | Olika | Wollega University | Ethiopia | Earth and Planetary Sciences | GIS | Best Researcher Award | |
| Mr | Ezekiel | Olatunji | University of Wolverhampton | United Kingdom | Other | Built Environment/ Disaster Risk Reduction/ Flood Resilience | Best Researcher Award | View Profile |
| Ms | Victoria Adedolapo | Olaposi | Department of Microbiology, University of Ibadan, Nigeria. | United Kingdom | Immunology and Microbiology | Enviromental Microbiology, Cellular and Molecular Biology, Biotechnology | Young Scientist Award | |
| Mr | Johnson | Oladele | Kings university | Nigeria | Biochemistry, Genetics and Molecular Biology | Toxicology, Phytoscience | Best Researcher Award | |