A ‣ Jobs in a workplace 
director [member of the board of a company]
executive /ɪɡˈzekjʊtɪv/ [important person who makes big decisions]
administrator [person who runs the office day-to-day]
skilled worker [trained to do specific tasks, e.g. building a computer]
unskilled worker [doing a job that needs no training]
receptionist [visitors must check in with them]
public relations officer [gives information about the company to the media]
union representative [looks after the staff's interests]
researcher [investigates and develops new products]
supervisor [makes sure workers are doing their job properly]
Common mistakes
The best way of getting to work (NOT job) depends on where you live.
Wish me luck in my new job (NOT work).
Job refers to a particular role or position. Jack's got a new job as a researcher.
Work refers to activities that you do. Jack's work is very demanding.
B ‣ Trades and professions 

C ‣ Collocations of words connected with work 
It's not easy to get/find work round these parts. I've been offered work / a job in Paris.
What d'you do for a living? I'm in publishing/banking, etc.
It's hard to make a living as a freelance writer. [ earn enough money to live comfortably]
She's not prepared to take on that job. [suggests 'having personal responsibility']
hours of work | to do shiftwork or to work shifts [nights one week, days the next week] to be on flexi-time [flexible working hours] to work nine-to-five [regular day work] |
not working | to go/be on strike [industrial dispute] to get the sack [thrown out of your job] to be fired (more formal than ‘get the sack’; often used in direct speech: ‘You’re fired!’) to be made redundant [thrown out, no longer needed] to be laid off (more informal than ‘made redundant’) to be on / take maternity (woman) or paternity (man) leave [before/after the birth of a baby) to be on / take sick leave [illness] to take early retirement [retire at 55) |
other useful expressions | to be a workaholic [Jove work too much] to be promoted [get a higher position] to apply for a job [fill in forms, etc.] |