The supervisor of Dianella-based building company Frayson has been fined $15,000 for failing in his duties as a manager and supervisor on work carried out at 20 Perth properties over a 10-year period.

The supervisor of Dianella-based building company Frayson has been fined $15,000 for failing in his duties as a manager and supervisor on work carried out at 20 Perth properties over a 10-year period.