| Prof. Dr | Ebrahim | Babaei | University of Tabriz | Iran | Best Researcher Award | popularengineer.org |
| Prof. Dr | Dragoș-Pătru | Covei | The Bucharest University of Economic Studies | Romania | Best Researcher Award | popularengineer.org |
| Mr | Donovan | Birky | University of Utah | United States | Outstanding Scientist Award | popularengineer.org |
| Prof. Dr | Donglin | Ren | The Sixth Affiliated Hospital, Sun Yat-sen University | China | Best Researcher Award | popularengineer.org |
| Mr | Dongju | Yang | North China University of Technology | China | Research Excellence Award | popularengineer.org |
| Prof | Dong | An | China Agricultural University | China | Best Researcher Award | popularengineer.org |
| Dr | Do-Gyoon | Kim | The Ohio State University | United States | Best Researcher Award | popularengineer.org |
| Mr | Dingqin | Hu | Department of Mechanical Engineering, City University of Hong Kong | China | Research Excellence Award | popularengineer.org |
| Mr | Diksha | Kumari | Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab | India | Research Excellence Award | popularengineer.org |
| Prof. Dr | Diego | Carvalho Viana | UEMASUL | Brazil | Best Researcher Award | popularengineer.org |
| Dr | Dharambir | Sanghera | Uni of Oklahoma Health Sciences Center | United States | Best Researcher Award | popularengineer.org |
| Dr. | Dhandapani | Raju | ICAR-IARI, New Delhi | India | Best Researcher Award | popularengineer.org |
| Assist. Prof. Dr | Devbrat | Pundhir | Raja Balwant Singh Engineering Technical Campus | India | Best Researcher Award | popularengineer.org |
| Mr | Deribew | Tola | Salale University | Ethiopia | Best Researcher Award | popularengineer.org |
| Prof | Deepak | Pathania | Central University of Jammu | India | Best Researcher Award | popularengineer.org |
| Dr | Dayeong | An | Medical College of Wisconsin | United States | Best Researcher Award | popularengineer.org |
| Dr | Dayanand | Sharma | Sharda University, Greater Noida | India | Research Excellence Award | popularengineer.org |
| Mr | Dawit | Alemayehu | Hokkaido university | Japan | Best Researcher Award | popularengineer.org |
| Assist. Prof. Dr | Davood | Zare | Iranian Research Organization for Science and Technology | Iran | Best Researcher Award | popularengineer.org |
| Prof | Davide | Frumento | RomaTre University | Italy | Best Researcher Award | popularengineer.org |