What is a word for a person with more expertise (in certain field) than an intermediate but less so than an expert?
Exactly what qualifies you to be a journeyman varies from profession to profession (if it is even used within a given profession).
It generally means someone who has completed all their training and is considered proficient without having yet proven their mastery.
Skilled, proficient http://www.synonyms.net/synonym/expert
However I have never seen the need.
novice/beginner, intermediate, expert
are the terms normally used