| Prof. Dr. | Daniel | Paramythiotis | University General Hospital of Thessaloniki AHEPA, Aristotle University of Thessaloniki | Greece | Best Researcher Award | popularengineer.org |
| Dr | Daniela | Fico | CNR-ISPC | Italy | Best Researcher Award | popularengineer.org |
| Mr | Dapeng Zhang | Zhang | Guangdong Ocean University | China | Research Excellence Award | popularengineer.org |
| Mr | Daria | Avdanina | “Fundamentals of Biotechnology” of the Russian Academy of Sciences (Research Center of Biotechnology RAS) | Russia | Women Researcher Award | popularengineer.org |
| Mr | David | Owolabi | MORGAN STATE UNIVERSITY | United States | Best Researcher Award | popularengineer.org |
| Prof | Davide | Frumento | RomaTre University | Italy | Best Researcher Award | popularengineer.org |
| Assist. Prof. Dr | Davood | Zare | Iranian Research Organization for Science and Technology | Iran | Best Researcher Award | popularengineer.org |
| Dr | Dayanand | Sharma | Sharda University, Greater Noida | India | Research Excellence Award | popularengineer.org |
| Dr | Dayeong | An | Medical College of Wisconsin | United States | Best Researcher Award | popularengineer.org |
| Mr | Deribew | Tola | Salale University | Ethiopia | Best Researcher Award | popularengineer.org |
| Assist. Prof. Dr | Devbrat | Pundhir | Raja Balwant Singh Engineering Technical Campus | India | Best Researcher Award | popularengineer.org |
| Dr. | Dhandapani | Raju | ICAR-IARI, New Delhi | India | Best Researcher Award | popularengineer.org |
| Dr | Dharambir | Sanghera | Uni of Oklahoma Health Sciences Center | United States | Best Researcher Award | popularengineer.org |
| Prof. Dr | Diego | Carvalho Viana | UEMASUL | Brazil | Best Researcher Award | popularengineer.org |
| Mr | Diksha | Kumari | Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab | India | Research Excellence Award | popularengineer.org |
| Mr | Dingqin | Hu | Department of Mechanical Engineering, City University of Hong Kong | China | Research Excellence Award | popularengineer.org |
| Prof | Dong | An | China Agricultural University | China | Best Researcher Award | popularengineer.org |
| Mr | Dongju | Yang | North China University of Technology | China | Research Excellence Award | popularengineer.org |
| Mr | Donovan | Birky | University of Utah | United States | Outstanding Scientist Award | popularengineer.org |
| Dr | Afful | Ekow Kelly | Catholic University of Ghana | Ghana | Best Researcher Award | popularengineer.org |