lærling in English:

She works in the hairdresser's as an apprentice.

This mostly concerns apprentices and other youngsters on the job market.

I was an apprentice

an apprentice electrician/chef/plumber

An apprentice works supervised at work an learns on the job.

I started off as an apprentice and worked my way up.

After the death of his parents, Michael served as an apprentice to a merchant.

He, as a student, applied for a position in a big company and became an apprentice there.

And of course, she was too old to be an apprentice.

He has worked as an apprentice for a year in our company.

A: And this is my apprentice. I look after him and train him. K: Hi I'm Karol Kraszewski and I also come from Poland. I learn on the job.

He's your senior fellow apprentice.