| 381 | Crossey Engineering Ltd. (A Salas O'Brien Company) | Vancouver |
| 382 | CTM Design Services Ltd. | Calgary |
| 383 | CTQ Consultants | Kelowna |
| 384 | CVL Engineers Inc. | Edmonton |
| 385 | Cyril J. Demeyere Limited | Tillsonburg |
| 386 | D-Code Engineering Ltd. | Saskatoon |
| 387 | D.E.S. Engineering Limited | Edmonton |
| 388 | D.G. Biddle & Associates Limited | Oshawa |
| 389 | D.G. Biddle & Associates Limited | Peterborough |
| 390 | D.M. Wills Associates Limited | Bancroft |
| 391 | D.M. Wills Associates Limited | Peterborough |
| 392 | Daniels Wingerak Engineering Ltd. | Saskatoon |
| 393 | Daniels Wingerak Engineering Ltd. | Saskatoon |
| 394 | David Nairne & Associates Ltd. | North Vancouver |
| 395 | David Schaeffer Engineering Ltd. | Markham |
| 396 | David Schaeffer Engineering Ltd. | Ottawa |
| 397 | Davroc & Associates Ltd. | Brampton |
| 398 | DBA Experts Conseils Inc | Repentigny |
| 399 | Dearden and Stanton Limited | Orillia |
| 400 | DECAST Ltd. | Utopia |
