| 261 | Crosbie Engineering Ltd. | St. John's |
| 262 | Crosier Kilgour & Partners Ltd. | Saskatoon |
| 263 | Crosier Kilgour & Partners Ltd. | Winnipeg |
| 264 | Crossey Engineering Ltd. (A Salas O'Brien Company) | Toronto |
| 265 | Crossey Engineering Ltd. (A Salas O'Brien Company) | Vancouver |
| 266 | CTM Design Services Ltd. | Calgary |
| 267 | CTQ Consultants | Kelowna |
| 268 | Cunliffe & Associates Inc. | Ottawa |
| 269 | CVL Engineers Inc. | Edmonton |
| 270 | Cyril J. Demeyere Limited | Tillsonburg |
| 271 | D-Code Engineering Ltd. | Saskatoon |
| 272 | D.E.S. Engineering Limited | Edmonton |
| 273 | D.G. Biddle & Associates Limited | Oshawa |
| 274 | D.M. Wills Associates Limited | Peterborough |
| 275 | D.M. Wills Associates Limited | Bancroft |
| 276 | Daniels Wingerak Engineering Ltd. | Saskatoon |
| 277 | David Nairne & Associates Ltd. | North Vancouver |
| 278 | David Schaeffer Engineering Ltd. | Markham |
| 279 | David Schaeffer Engineering Ltd. | Ottawa |
| 280 | Davroc & Associates Ltd. | Brampton |
