(someone) was promoted to (a position)
When a person gets a higher position within a company, you can say that the person "was promoted".
You can give information about the old job and the new job this way:
Did you hear that Jana was promoted from Sales Assistant to Account Manager?
You can also use the active voice:
Frank promoted Kenji to Copy Chief.
But this phrase is usually said in passive voice ("was promoted" or "got promoted").