The STS incorporates all those involved or interested in underground construction projects:

  • the client's representative,
  • engineers,
  • site managers,
  • construction company representative,
  • members of universities,
  • representatives of the tunnelling industry.

The STS consists of individual and collective members. Membership is not limited to SIA members, but also open to all Swiss and foreign specialists, which are interested in underground constructions.

Development of the number of members

Members backlog at December 31, 2022:

  • 541 Individual member
  • 88 Collective member