| Dr | Olawale | Olayide | University of Ibadan | Nigeria | Agricultural and Biological Sciences | Agri-preneurshup and sustainable development | Most Reader's Article Award | |
| Dr | Olga | Dymshits | S.I. Vavilov State Optical Institute | Russia | Materials Science | optical materials | Best Researcher Award | |
| Prof. Dr | OLIANA | CARNEVALI | Polytechnic University of Marche | Italy | Biochemistry, Genetics and Molecular Biology | Environmental Toxicology | Best Researcher Award | bestpaperawards.com |
| Dr | Olusegun | Idowu | Kyoto University | United Kingdom | Agricultural and Biological Sciences | Crop Science | Best Researcher Award | |
| Assist Prof Dr | OLUWAGBEMIGA PAUL | AGBOOLA | ISTANBUL GELISIM UNIVERSITY, ISTANBUL. TURKEY | Turkey | Environmental Science | Landscape Architecture, Urban Sustainability | Best Researcher Award | |
| Dr | oluwasanmi | Olabode | Covenant University | Nigeria | Engineering | Petroleum Engineering/Reservoir Engineering/Enhanced oil recovery and Optimization | Best Researcher Award | |
| Dr | Om Prakash | Singh | University of Plymouth | United Kingdom | Engineering | Biomedical Engineering | Best Researcher Award | bestpaperawards.com |
| Prof. Dr | Om Prakash | Pandey | Thapar Institute of Engineering & Technology | India | Materials Science | Electrochemical energy storage and conversion | Most Reader's Article Award | |
| Mr | Omar | Assowe | Observatoire Regionale de Recherche sur l'environnement et le Climat (ORREC)/Centre of Study and Research of Djibouti | Djibouti | Environmental Science | Climat | Most Reader's Article Award | |
| Prof Dr | Omar | Bajjou.omar@gmail.com | Sultan moulay slimane university Faculty of sciences and Technics Beni Mellal | Morocco | Materials Science | Matériaux | Best Researcher Award | |
| Dr | Omar | Otoom | Hychem | Australia | Engineering | Structural Engineering | Best Researcher Award | bestpaperawards.com |
| Dr | Omar | Al-Yahia | Paul Scherrer Institut | Switzerland | Energy | Reactor thermal hydraulics | Best Researcher Award | bestpaperawards.com |
| Dr | Omar | Soufi | Mohammed V University of Rabat Mohammadia School of Engineering | Morocco | Engineering | Intelligence artificielle, controle d'attitude, capteur d'étoiles | Best Researcher Award | bestpaperawards.com |
| Dr | Omar | Bani-Khalaf | Rauf Denktas university | Turkey | Economics, Econometrics and Finance | Finance | Best Paper Award | |
| Assoc. Prof. Dr | Ömer Faruk | Görçün | Kadir Has University | Turkey | Decision Sciences | Decision Making, fuzzy logic, optimization | Best Paper Award | bestpaperawards.com |
| Dr | Omid | Pourali | K. N. Toosi University of Technology | Iran | Energy | Biorefinery | Most Reader's Article Award | |
| Dr | Omid | Alasti | Gorgan University of Agricultural Sciences and Natural Resources (GUASNR) | Australia | Agricultural and Biological Sciences | Crop Science | Best Researcher Award | |
| Dr | Omotosho | Ademola | Central Universit of Technology South Africa | South Africa | Business, Management and Accounting | Entrepreneurship | Best Researcher Award | |
| Prof Dr | Orlando | Auciello | University of Texas at Dallas | United States | Materials Science | microelectronic device appllications | Most Reader's Article Award | |
| Prof | Osama | ALY | National research center | Egypt | Chemical Engineering | Textiles | Best Paper Award | |