resident
noun
°person, animal or plant living at a location or in an area.
"The tiger lily is a resident of Asia."
°a graduated medical student who is receiving advanced training in a specialty.
"She's a resident in neurosurgery at Mass General."
adjective
°the person on hand who is the strongest in a particular skill or profession.
"He is our resident UNIX expert."
°a student in the medical profession who watches a licensed doctor in order to learn a skill.
"For privacy reasons, she requested the resident nurse to leave."