Successful switchers tend to be highly curious people who pursue risky approaches and constructive feedback, according to Rich Wellins, a senior vice president of human-resources consultants Development Dimensions International.

WSJ: How to Switch Careers, Companies and Roles

Hill, L-3's vice president of human resources.

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"You're looking to fill a position with the best possible hire and that doesn't necessarily preclude or exclude somebody with a disability, " said Joe Trauger, a vice president for human-resources policy at the National Association of Manufacturers, a trade group representing 11, 000 companies.

WSJ: U.S. Pushes Target for Hiring the

"Somebody who comes in and says, look how great I am--that can be a serious turn-off, " says Jeff Hunter, vice president of human resources at Dolby Laboratories in San Francisco and a career and workplace consultant for Glassdoor.com, a job review and ratings site.

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"It's very incremental and deliberate re-hiring, " said Jon Downs, senior vice president of human resources for Toll.

WSJ: Who's Hiring? Not Who You'd Expect

"They treat an internship as a 10- to 12-week job interview, " says Alex Taylor, a vice president and human resources manager at Bank of America in Charlotte, N.

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John Moore, vice president of human resources, says that complying with the first round of changes next year will raise health-care costs by 2% for the company.

WSJ: Firms Fret Over Health Care