| 221 | AtkinsRéalis Operations & Maintenance | Yellowknife |
| 222 | Atlantic Engineering Consultants Ltd. | Corner Brook |
| 223 | Ausenco Engineering Canada Inc. | Vancouver |
| 224 | Ausenco Engineering Canada Inc. | Burlington |
| 225 | Ausenco Engineering Canada Inc. | Burnaby |
| 226 | Ausenco Engineering Canada Inc. | Calgary |
| 227 | Ausenco Engineering Canada Inc. | Dartmouth |
| 228 | Ausenco Engineering Canada Inc. | Toronto |
| 229 | Ausenco Engineering Canada Inc. | Victoria |
| 230 | Ausenco Engineering Canada Inc. | Whitehorse |
| 231 | Ausenco Engineering Canada Inc. | Yellowknife |
| 232 | Avizo experts-conseils | Sherbrooke |
| 233 | B. M. Ross and Associates Limited | Goderich |
| 234 | B. M. Ross and Associates Limited | Brights Grove |
| 235 | B. M. Ross and Associates Limited | Mount Forest |
| 236 | BA Consulting Group Ltd. | Toronto |
| 237 | Banner Environmental Engineering Consultants Ltd. | Calgary |
| 238 | Banner Environmental Engineering Consultants Ltd. | Diamond Valley |
| 239 | Basis Engineering Ltd | Burnaby |
| 240 | BBA | Mont-Saint-Hilaire |
