Theorie:

To speak about professions, you need the appropriate vocabulary. Part 4
  
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Secretary - someone who works in an office, typing letters, answering the telephone, and arranging meetings, etc;

Shepherd - someone whose job is to look after sheep;

Shop assistant - someone whose job is selling things in a shop;

Singer - someone who sings;

Stationer - a shop where you can buy pens, paper, and other things for writing;

Surgeon - a doctor who does medical operations;

Teacher - someone whose job is to teach in a school, college, etc;

Tiler - a person who fixes tiles to a surface;

Tobacconist - a person who is in charge of a shop where tobacco, cigarettes, etc. are sold;

Vet/veterinary surgeon/veterinarian - someone whose job is to give medical care to animals that are ill or hurt;

Vocalist - the person who sings in a group of people who play popular music;

Waiter - a man who works in a restaurant, bringing food to customers;

Waitress - a woman who works in a restaurant, bringing food to customers;

Zoologist - someone who studies zoology.

Examples:

There are many shop assistants in this shop.

Sally Wilson is your new teacher.

Where is the waiter? We are waiting for him.