In discussing the office of an overseer, Paul was not requesting that Timothy begin a new office in the church. Men were already functioning in the position (Acts 14:23; 20:17, 28). What Paul stipulated was that those appointed to the office were to possess qualifications of commitment.
Lea, Thomas D., and Hayne P. Griffin. 1, 2 Timothy, Titus. Vol. 34. Nashville: Broadman & Holman Publishers, 1992. Print. The New American Commentary.