Under federal law, it is not necessary that an employee...

Under federal law, it is not necessary that an employee be permitted to leave the premises during a break. Credit: iStock

As the economy continues to heal from the Great Recession, job security is more important than ever to most workers. Employees can preserve job security by making sure they are irreplaceable to their companies, says Laurence Shatkin in his new book, "150 Best Jobs for a Secure Future."

"Sometimes jobs are threatened because a particular business gets into trouble even though the economy may be in good shape," says Shatkin. "(But) even a prosperous business may need to lay off workers."

"Whatever the reason for the layoffs, you may be able to hang onto your job if you're irreplaceable. You need to be so vital to the business that it can't go on without you."

Here are some of Shatkin's tips:

-- Many businesses diversify and serve several functions, but usually there's a central mission that makes money and determines if the business will succeed or fail. Identify that central function and play a role in it. Identify the skills the business needs for future development of this function and acquire them.

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