The group of 43 workers are taking industrial action after their supervisors were handed a £1.75 an hour pay increase, while the rest of the workforce were given a pay freeze.
The vote in favour of industrial action was overwhelming with a 92% yes vote on a turnout of 88%.
Denis Doody, Regional Secretary for UCATT Northern Region, said: “Workers do not take industrial action lightly but the company is clearly acting unfairly.”
He added: “UCATT is urging Amec to come back to the negotiating table, make an acceptable offer and avert this industrial action”