If you can find a lawyer(who is willing to take the case and not personal involved , like connections from the lawyer or somebody he knows to the other party ), it will cost a lot of money(you can estimate the lawyer will charge around 300-400 sfr per hour).
You better have an insurance(to pay the lawyer) , otherwise the employer
can play "the slow" card, means the play goes until you got no money left.
You have to find the amount, wich is the value of the dispute, then you can calculate how much the lawyer can cost.