| Dr | Dismas Odhiambo | Oketch | University of Nairobi | Kenya | Health Professions | One Health | Best Research Article Award | environmentalscientists.org |
| Mr | OLUFISAYO | OJO | DURBAN UNIVERSITY OF TECHNOLOGY | Nigeria | Environmental and Sustainable Materials | Sustainability and Waste Management | Best Researcher Award | environmentalscientists.org |
| Mr | Samuel | Ojo | Case Western Reserve University | United States | Engineering | Civil and Environmental Engineering | Best Researcher Award | environmentalscientists.org |
| Dr | Oluwatayo | Ojo | Cranfield University | United Kingdom | Engineering | Energy Economics and Policy | Best Researcher Award | environmentalscientists.org |
| Dr | Enes Cengiz | Oguz | Anglia Ruskin University | United Kingdom | Economics, Econometrics and Finance | Environmental and Sustainable | Research Excellence Award | environmentalscientists.org |
| Mr | John | Ogundiran | ADAI-DEM, University of Coimbra | Portugal | Environmental Science | Indoor environmental Quality | Excellence in Scientific Innovation Award | environmentalscientists.org |
| Mr | Samuel | Ogundahunsi | Memorial University of Newfoundland | Canada | Engineering | Energy system Engineering | Best Researcher Award | environmentalscientists.org |
| Dr | Michael | Odey | University of Calabar | Nigeria | Environmental and Sustainable Materials | Environmental Toxicology | Best Researcher Award | environmentalscientists.org |
| Mr | Silas | Ochieng | DT Global | Kenya | Economics, Econometrics and Finance | Socio-Economics in Fisheries & Aquaculture | Excellence in Research | environmentalscientists.org |
| Dr | Mohammad | Obeid | Shenandoah University | United States | Computer Science | Virtual Reality | Best Researcher Award | environmentalscientists.org |
| Mr | Onesme | NZASABAYEZU | Gandhi Institute of Technology and Management | India | Others | Poverty Alleviation Strategies for Sustainable Development | Best Researcher Award | environmentalscientists.org |
| Mr | Fernando | Nunes Cavalheiro | University of Vigo | Spain | Others | Structure Engineering | Best Researcher Award | environmentalscientists.org |
| Dr | Maria | Ntoumpara | 4th Department of Pediatrics, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece | Greece | Medicine and Health Sciences | Pediatrics | Best Researcher Award | environmentalscientists.org |
| Mr | Byung-Il | Noh | Auburn University | United States | 2D Materials and Beyond | Nano-Optics and Light-Matter Interactions | Best Researcher Award | environmentalscientists.org |
| Dr | Md. Eanamul | Nizam | Assistant Professor, Department of Textile Engineering | Bangladesh | Environmental and Sustainable Materials | Textile | Best Researcher Award | environmentalscientists.org |
| Dr | EMMANOUIL | NIKOLAIDIS | Frederick University | Greece | Business, Management and Accounting | Maritime | Research Excellence Award | environmentalscientists.org |
| Dr | Zinaida | Nikiforova | Diamond and Precious Metal Geology Institute, SB RAS | Russia | Advanced Materials Engineering | gold deposits | Best Researcher Award | environmentalscientists.org |
| Dr | Ngoc | Nguyen | University of Sydney | Australia | Social Sciences | Higher Education | Best Researcher Award | environmentalscientists.org |
| Assist. Prof. Dr | Esdras | Ngezahayo | University of Birmingham | United Kingdom | Environmental and Sustainable Materials | Construction materials | Best Researcher Award | environmentalscientists.org |
| Ms | Otgonpurev | Nergui | Nuclear Research Center, National university of Mongolia | Mongolia | Engineering | research of environmental issue, comparison of policy, engineering, physics | Best Researcher Award | environmentalscientists.org |