Workers at ADL have voted to strike, the BBC reported.
Unite claimed the action was in response to a 3.5% pay offer. Since 2011, workers had an annual 4% increase in pay which was cut to 3.5% this year. Unite said 75% of the workers voted in favour of strike action on an 80% turnout.
ADL employs about 2,400 staff in the UK and abroad and reported a 56% rise in pre-tax profits to £24.2m in July.
Lyn Turner from Unite said: “We are dismayed ADL management think workers, who brought the company back from the brink less than four years ago, should accept an increase below expectation while company profits and executive pay goes through the roof.”
An ADL spokesman said: “Our offer means the Falkirk workforce will have received wage increases of 11.5% since 2011. With demand in the UK bus sector down 20% we believe this is a more than fair offer.”
