Collocations for profession - noun

chosen
noble (esp. AmE)
We are members of an old and noble profession.

caring (BrE), health-care (esp. AmE), helping (AmE)
She always wanted to work in the caring professions.
training programs for the helping professions

legal, medical, nursing, teaching, etc.

practise/practice
In the 1930s he was forbidden to practise/practice his profession.

enter, go into, join
She entered the legal profession after college.

learn
a job where people can learn the profession

advance (esp. AmE)
Nurses advance the profession through active involvement in their professional organizations.

serve (esp. AmE)
He has served the medical profession admirably.

regulate
the licensing laws that regulate the profession

change
It's time to change your profession for something more exciting.

leave
the primary reason why nurses leave the profession

by profession
He was a physician by profession.

in a/sb's/the profession
She's making an impact in her chosen profession.

a choice of profession
She was shocked at her daughter's choice of profession.

the top of sb's profession
He reached the top of his profession in very little time.

the oldest profession (= prostitution)
Prostitution is often described as the oldest profession in the world.