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Derrick Lewis has new appreciation for something a coworker told him 20 years ago: “You have to keep learning.” That advice means more for Lewis now because at age 55, he’s started classes

to earn a certificate in culinary arts. A food-service manager for the Georgia Department of Corrections, Lewis arrives at work at 4 a.m., leaves at 7, and by 8 a.m. is in a classroom at

Wiregrass Technical College in Valdosta, Ga. Then he goes back to his job to finish his eight-hour shift. “It’s a long day, but it’s worth it,” says Lewis. He’s pursuing the certificate so

he can rise through the ranks to an office job. “These positions require so much more than they used to.” More and more, people such as Lewis are seeking certificates to help improve their

income or job security, or to get promoted. Certificates — which are offered at community colleges and four-year institutions, both online and in person — usually take less time in the

classroom to earn than associate or bachelor’s degrees. Many, in fact, take less than a year to complete. The skills taught in these programs tend to focus on what you need to know for

particular jobs or within specific industries — from the ins and outs of the business accounting software Quickbooks to preparing to become a personal fitness trainer. In many cases,

certificate programs at community colleges are specifically tailored to teach the skills employers in the region are looking for. Certificates can be a quick way to add skills to a

worker's portfolio and increase income. Research shows that earning one of these credentials can offer a real boost in salary. For example, supply chain and logistics managers who get

certificates related to data skills to analyze traffic and order patterns can see their salaries increase from $70,000 to $85,000, according to research by Burning Glass Technologies, which

analyzes data on labor markets. School administrators who get training in data analysis go from $68,000 to $78,000 a year, on average. Graphic designers who make $54,000 can see their

salaries increase to $75,000 if they master front-end web development. “The certificate functions as a supply signal, saying, ‘I’ve got some skills that are increasingly in demand in the

market,’ ” says Matt Sigelman, CEO of Burning Glass. Sigelman notes that like all employees, older workers need to “do their homework to make sure the skill they’re learning is actually in

demand in the field they’re in, and that jobs with those skills pay more.”