Please click on the link below to complete a joining application:
| A Irvine Contracts |
| Advance Construction (Scotland) Ltd |
| Allma Construction Ltd |
| Amey Group |
| Barhale plc |
| Binnies UK Limited |
| Boyle Construction (Glasgow) Ltd |
| Breedon Trading Ltd |
| C.E.C.A. (Scotland) |
| Cleantech Civils Ltd |
| David Hardie Engineering Ltd |
| DP Services (Holdings) Ltd |
| Dunelm Geotechnical & Environmental Ltd |
| Emac Engineering Ltd |
| Farrans Construction Ltd |
| GCU UK Ltd |
| George Leslie Ltd |
| Global Infrastructure Scotland Ltd |
| Hillhouse Quarry Group Ltd |
| Hunter Construction (Aberdeen) Ltd |
| I & H Brown Ltd |
| Kelburne Construction Ltd |
| Kilmac Ltd |
| KN Group |
| Luddon Construction Ltd |
| MacKenzie Construction Ltd |
| Malcolm Construction Services |
| McLaughlin & Harvey Construction Ltd |
| Morrison Construction Services Ltd (North) |
| M W Groundworks Ltd |
| R J McLeod Ltd |
| Ross-shire Engineering |
| SDB Contracts Ltd |
| Seivwright Bros Ltd |
| Story Contracting Ltd |
| Wallace Dick & Sons |
| Wills Bros |
| UB Civils Ltd |