About 100 posts have been saved after a consortium, led by private investor StephenBoyd, acquired the business last week as a going concern from administrators Duff and Phelps.
Speaking on behalf of the STUC, StephenBoyd said the discussion could not take place "divorced from the state of the macroeconomic environment" and while employers had legitimate concerns about taking on vulnerable young people, much of the employer position was "prejudiced as much as evidenced".