Mark Hamrick

That's substantially below the total number of unemployed persons that were reported by the Labor Department in the most recent employment report.

Hamrick says it's the reverse of a few years ago when there were two job openings for every unemployed worker.

So we are seeing, I think, now a bit of a misalignment between the supply and demand.

And some sectors seem to be misaligning faster than others, says Tuan Nguyen, an economist at RSM.