proficient

adroit, clever, deft, dexterous (also dextrous), handy, slick, sure-handed

gifted, talented

polished, refined

effective, effectual, efficient, workmanlike

able, capable, competent, employable, fit, fitted, habile, qualified

educated, knowledgeable, schooled, taught, trained, tutored

all-around (also all-round), well-rounded

long-term, old

multiskilled, multitalented

pro, professional

consultant, hired gun, specialist

addict, aficionado (also afficionado), buff, devotee, enthusiast, fan

craftsman, journeyman

all-rounder [British], jack-of-all-trades, Renaissance man

mistress