resident
(n) : person, animal or plant living at a location or in an area; a graduated medical student who is receiving advanced training in a specialty
"the tiger lily is a resident of Asia."
(adj) : the person on hand who is the strongest in a particular skill or profession; a student in the medical profession who watches a licensed doctor in order to learn a skill
"he is our resident UNIX expert."
synonyms: inhabitant, dweller, denizen more», indweller, doctor, doc, physician, MD, medico