UNDATED (WTVB) - There are lots of jobs available but not enough skilled workers to fill them.  That's the complaint of employers who say there's a severe shortage of people with computer, math and science training. 

The technology giant Siemens Corp. for example says it has more than three-thousand job openings across the U.S. right now.  More than half require technology, engineering and math-related skills.  Other companies say they're facing the same problem, many noting they've had positions open for at least nine months but can't find people qualified to fill the slots.

A recent survey by Manpower Group found 52-percent of employers say they have a problem filling critical positions.  The hardest jobs to fill are for skilled trades ranging from Internet technology to machine operators. 

A brain drain of baby boomers is adding to the problem.  As they retire in increasing numbers there are fewer skilled people available to replace them.