ready, adroit, deft, adept, apt, clever, ingenious. Skillful, skilled, expert refer to readiness and adroitness in an occupation, craft, or art. Skillful suggests especially adroitness and dexterity: a skillful watchmaker.
Skilled implies having had long experience and thus having acquired a high degree of proficiency: not an amateur but a skilled worker.
Expert means having the highest degree of proficiency; it may mean much the same as skillful or skilled, or both: expert workmanship.
See also dexterous