| 2020 | 2021 | 2022 | |
| Administration staff | 8 | 10 | 10 |
| Leading engineering staff | 11 | 12 | 12 |
| Wage group 6 Supervisor / Construction machine supervisor | 0 | 0 | 0 |
| Wage group 5 Foreman / Construction machine foreman | 19 | 20 | 20 |
| Wage group 4 Special skilled worker / construction machine operator |
7 | 5 | 5 |
| Wage group 3 Skilled worker / equipment operator / truck driver |
14 | 22 | 22 |
| Wage group 2 Labourer / machinist / driver | 14 | 16 | 16 |
| Wage group 1 Worker / machine worker | 0 | 0 | 0 |
| Apprentices | 3 | 3 | 3 |
| Total number of employees | 76 | 88 | 88 |