Oil well

Oil pumper -- Checking/fixing gas and oil wells. (Photo by David McNew/Newsmakers)

Retail general manager -- Oversee day-to-day operations of a retail store that includes hiring, supervising, putting together sales promotions and customer relations. Having prior sales experience is very important for someone who does not have a college degree. (Photo by Sandy Huffaker/Getty Images)

(Photo by Joe Raedle/Getty Images)

File photo of a factory

Millwright -- Install, assemble and dismantle machinery, conveyor systems and equipment in factories, power plants and construction sites. Most in this field enter it through an apprenticeship program which typically last four years and are sponsored by local union chapters, employers or state labor departments.(Sean Gallup/Getty Images)

Crane

Mobile crane operator -- Use equipment to lift and move heavy objects including materials and machinery. Typically work in warehouses, storage yards and construction/destruction sites. Most companies require little or no formal training. However, employers usually require workers to be at least 18 years old and physically able to perform the job's tasks. Six cities and 17 states currently require…

File photo of a restaurant kitchen

Food service director -- Responsible for hiring, training and supervising staffs at restaurants or food service facilities. Typical responsibilities include ordering supplies and coordinating employees' schedules. Most companies prefer people to have prior experience in the food or hospitality industries. (Photo El Bulli Restaurant/Getty Images)