journeyman

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One who has fully served an apprenticeship in a trade or craft and is a qualified worker in another's employ.
• noun An experienced and competent but undistinguished worker.

from The Century Dictionary.

• noun In astronomy, a secondary clock in an observatory: used, generally, as an intermediary in the comparison of standard clocks: more fully, journeyman clock.
• noun A man hired to work by the day; a day-worker.
• noun A workman or mechanic who has served his apprenticeship; specifically, a qualified mechanic employed in the exercise of his trade, as distinguished from a master mechanic or a foreman.

from the GNU version of the Collaborative International Dictionary of English.

• noun Formerly, a man hired to work by the day; now, commonly, one who has finished an apprenticeship and is a competent worker in a handicraft or trade, but has not received recognition as a master; -- distinguished from apprentice and from master workman.
• noun A competent and experienced worker who performs adequately but without a high level of expertise or imagination.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a tradesman who has served an apprenticeship and is employed by a master tradesman
• noun a competent but undistinguished tradesman, especially one who works, and is paid by the day
• noun sports a player who plays on many different teams during the course of his career

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a skilled worker who practices some trade or handicraft