Federal Department of Employment staff will not accept their latest offer, voting against a bargain laid out this week.

The Community and Public Sector Union (CPSU) says it was the first time a Federal Government deal had actually reached the members’ voting stage, even after eight months of bargaining.

The union said 95 per cent of employees voted against the proposed offer, which would have removed workers' superannuation protections, made some promotions more difficult, increased working hours and seen 46 jobs cut.

All of this would have been given up for a 1.4 per cent over three years pay rise.

“The message to Employment Minister Eric Abetz is crystal clear; don't cut our conditions and real wages,” she said.

“If Minister Abetz's own staff won't swallow such a terrible deal, how can he expect the rest of the public service to do so.

“We are calling again on the Minister to sit down with the CPSU and work together to find a sensible resolution to the Commonwealth bargaining train wreck.”

It is the latest in growing industrial unrest within the 165,000-person federal public service, of which about 1,800 work for the Department of Employment.

Existing workplace agreements for all public servants expired on June 30, 2014, but the stymied talks to not look like bringing a better deal anytime soon.

Staff at the Department of Human Services are maintaining their plans for a string of low-level industrial actions.