MINEOLA - More than 400 Nassau County workers could get pink slips for Christmas if their unions refuse to make concessions.

County Executive Ed Mangano (R-Nassau) wants $75 million in concessions approved by Dec. 15, or he says 435 workers could be unemployed by Feb. 1. Mangano adds that the hardest-hit department would be Social Services, which stands to lose 144 workers.

Another 217 county workers could be demoted to lower-paying jobs.

Nassau's CSEA President Jerry Laricchiuta says he'll work on concessions only if the state watchdog group NIFA changes its requirements. He says currently, NIFA officials are looking for concessions totaling about $12,000 per year for each CSEA employee.

"That's just not going to happen, and if that's the only alternative that they leave us with, well, then Nassau's going to suffer crippling layoffs," he says.

Both sides are expected to be back at the negotiating table before the end of this week.