| Matt | DeCourcey | Trans Canada Trail | 57 |
| Mike | DeGagne | Indspire | 82 |
| Nicole | DeKort | Medtech Canada | 5 |
| Erell | Delesvaux | BHP | 69 |
| Sabreena | Delhon | Samara Centre for Democracy | 35 |
| William | Dempster | 3Sixty Public Affairs | 96 |
| Kevin | d'Entremont | McKinsey & Company | 47 |
| Monica | De Re | Johnson & Johnson Innovative Medicine | 6 |
| Neil | Desai | n/a | 54 |
| Gitane | De Silva | GDStrategic | 51 |
| Catherine | Despatie | Public Policy Forum | 4 |
| Gurkamal | Dhahan | Mitacs | 50 |
| Bindu | Dhaliwal | CIBC | 34 |
| ADM Patrick | Dicerni | Ministry of Health | 77 |
| Brandon | Dickson | Western University | 40 |
| Antonio | Di Domenico | Fasken Martineau | 5 |
| Michael | Dietrich | Innovative Medicines Canada | 6 |
| Melissa | Di Marco | Accuracy Canada | 18 |
| Jennifer | Ditchburn | Institute for Research on Public Policy (IRPP) | 7 |
| Jacquie | Dobson | Innovative Medicines Canada | 6 |
