Twenty-one community service supervisors have been on strike since January in the dispute over their place in the authority’s 2006 pay and grading review.
Unison branch secretary Brian Smith said that offenders sentenced to community service in the city were sitting at home as a result of the dispute and that the council had refused requests to explain how the new pay rates were calculated.
“Glasgow City Council has refused to formally involve ACAS as a third party, which we requested in an effort to resolve this dispute. We have waited six months for information on how the council evaluated these jobs, yet they have refused to even answer basic questions,” he said.
“The council is trying hard to make this a forgotten strike.
“Our members perform a vital service and they now feel as if they are being victimised by the council for pursuing a legitimate claim.”
A city council spokesman said the authority had made an appropriate offer to staff based on the skills needed for the job, but the offer had been rejected.
"The service needs reform, but those in dispute want a pay rise," he said.
"We have been deeply disappointed by this strike, but we remain open to constructive talks."