Former employees at a mill owned by John Laing are in line for compensation payouts totalling £120,000 after a ruling at an employment tribunal.
GMB brought the case after 30 former workers at the Hawick-based firm were left without positions when the firm went into the hands of receivers last year.
The body's case hinged on a claim that John Laing had not consulted the workers' union over its decision, which was in breach of company regulations.
As a result the workers only found out about the impending loss of their jobs through local newspapers and a subsequent meeting at their workplace, which they say left them in a state of shock and distress.
The tribunal awarded a protective award of £4,000 to each worker.
John Farries of the GMB told the BBC: "The firm must have known for some time it was having problems. They could have come to us earlier and said they had difficulties. All it would have taken was a phone call."