proficient

Having or marked by an advanced degree of competence, as in an art, vocation, profession, or branch of learning.

A person who exhibits such competence; an expert.

Well versed in any business, art, science, or branch of learning; skilled; qualified; competent.

One who has made considerable advance in any business, art, science, or branch of learning; an adept; an expert.

One who has made considerable advances in any business, art, science, or branch of learning; an expert; an adept.