(SFGATE) — In 2012, three high-tech companies in Silicon Valley announced they were laying off a combined 48,000 employees. Layoffs continue this year, including last week’s announcement that profitable Cisco Systems was letting 4,000 people go.

At the same time, the total number of jobs in the valley and in San Francisco’s tech hub is on the rise. In fact, tech executives claim to have tens of thousands of jobs going begging, so much so that they need to bring in educated workers from overseas to fill them.

But if demand is outstripping supply, how come so many skilled IT professionals in the Bay Area are out of work? In a nutshell, job experience in the tech industry matters far less than it once did. In fact, it can work against you.

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