| 2022 | 2023 | 2024 | |
| Administration staff | 10 | 8 | 8 |
| Leading engineering staff | 12 | 11 | 12 |
| Wage group 6 Supervisor / Construction machine supervisor | 0 | 6 | 6 |
| Wage group 5 Foreman / Construction machine foreman | 20 | 13 | 14 |
| Wage group 4 Special skilled worker / construction machine operator |
5 | 5 | 5 |
| Wage group 3 Skilled worker / equipment operator / truck driver |
22 | 28 | 28 |
| Wage group 2 Labourer / machinist / driver | 16 | 11 | 16 |
| Wage group 1 Worker / machine worker | 0 | 0 | 0 |
| Apprentices | 3 | 1 | 1 |
| Students | 0 | 2 | 0 |
| Total number of employees | 88 | 85 | 90 |