1. astronaut [noun] someone who travels and works in a spacecraft
An astronaut works in space.

2. businessman / businesswoman [noun] someone who works in business
The businessman is trying to make a business deal.

3. doctor [noun] someone who helps people who are sick
I went to see a doctor because I felt sick.

4. engineer
engineer [noun] someone whose job is to design or build roads, bridges, machines etc
I want to become an engineer to build roads.

5. fire fighter [noun] someone who stops fire from burning
A fire fighter helps put out fire.

6. flight attendant
flight attendant [noun] someone whose job is to look after or help customers on a plane
The flight attendant is showing us how to use the mask.

7. football player [noun] someone who plays football for a living
David Beckham is a football player.

8. plumber
plumber [noun] someone whose job is to repair water pipes, baths, toilets etc
We need to get a plumber to repair this water pipe.

9. professor [noun] a teacher who teaches at a university
Professor Wong teaches mathematics at university.

10. secretary
secretary [noun] someone who works in an office typing letters, keeping records, answering telephone calls, arranging meetings etc
My secretary will fax you all the details.