| 1321 | StructureCraft | Trento |
| 1322 | StructureCraft | Vancouver |
| 1323 | T. L. Mak Engineering Consultants Ltd. | Ottawa |
| 1324 | T.Y.Lin International Canada Inc | Vancouver |
| 1325 | T.Y.Lin International Canada Inc. (formerly TMIG) | Vaughan |
| 1326 | T.Y.Lin International Canada Inc. (formerly TMIG) | Whitby |
| 1327 | T2 Utility Engineers Inc. | Edmonton |
| 1328 | T2 Utility Engineers Inc. | Nepean |
| 1329 | T2 Utility Engineers Inc. | Oakville |
| 1330 | T2 Utility Engineers Inc. | Whitby |
| 1331 | T2 Utility Engineers Inc. | Whitby |
| 1332 | Tacoma Engineers Inc. | Guelph |
| 1333 | Tacoma Engineers Inc. | Barrie |
| 1334 | Tacoma Engineers Inc. | Waterloo |
| 1335 | Tatham Engineering Limited | Barrie |
| 1336 | Tatham Engineering Limited | Bracebridge |
| 1337 | Tatham Engineering Limited | Collingwood |
| 1338 | Tatham Engineering Limited | Orillia |
| 1339 | Tatham Engineering Limited | Ottawa |
| 1340 | Tecsar Engineering Inc. | Sarnia |
