Concern is mounting no decision will be made in time for Christmas on a potential lifeline renewables contract for BiFab.
The firm is currently competing for a Moray East Windfarm fabrication deal, which many hoped would be announced before the festive period.
Union boss Gary Smith said he feared more than 1000 jobs will continue to hang in the balance well into 2019, as the firms in charge delay decisions.
Mr Smith, GMB Scotland secretary, said he was disappointed the Scottish Government had not done more to put pressure on a decision and provide clarity on renewable energy job opportunities.
He said: “We’ve got three yards lying empty that could be doing renewables work, meanwhile we’ve got a farce of an energy transition commission being set up when the truth is there are no manufacturing renewables jobs in Scotland.
“The dislocation between the real world and the political rhetoric is ridiculous.”
Belgian firm DEME Group is responsible for any “final tender selection” for Moray East.
However, chief executive Alain Bernard confirmed earlier this year that his firm is only responsible for whittling down candidates, and that “the final choice lies with the project owner who will, we are sure, carefully consider local procurement options”.
A Scottish Government spokesperson last night said:“We have made a long term investment in the company, and are in regular contact with BiFab, however, we do not participate in operational management decisions.
“It was clear at the point new ownership was secured that conditions would remain challenging for the yards and new contracts would have to be won to secure future work.
“We have confidence that everything possible is being done to secure new contracts, restore employment to previous levels and solidify the future of the current workforce.”
A spokeswoman for DEME Group said the company “could not confirm a Moray East Windfarm fabrication contract date while discussions are ongoing”.