| 2014 | 2015 | 2016 | |
| Administration staff | 2 | 2 | 2 |
| Leading engineering staff | 5 | 7 | 8 |
| Wage group 6 Supervisor / Construction machine supervisor | 6 | 6 | 6 |
| Wage group 5 Foreman / Construction machine foreman | 3 | 4 | 4 |
| Wage group 4 Special skilled worker / construction machine operator |
3 | 5 | 5 |
| Wage group 3 Skilled worker / equipment operator / truck driver |
12 | 16 | 18 |
| Wage group 2 Labourer / machinist / driver | 5 | 3 | 6 |
| Wage group 1 Worker / machine worker | 0 | 0 | 0 |
| Apprentices | 0 | 0 | 0 |
| Total number of employees | 36 | 43 | 49 |