OFFICES OF THE CHURCH
First of all, the head of the church is the Lord Jesus Christ (Heb. 13:20; 1 Pet. 2:25; 5: 4; 1 Cor. 11:3; Eph. 1:22; 4:15; 5:23; Col. 1:18).
There are teachers whose ministry is an actual calling of God and is confirmed by the church. As a teaching minister it is his duty to feed God’s flock. In many cases he can serve as an evangelist to bear the “Good News” of salvation to the lost. He is to exhort the brothers and admonish (hopefully convince) the skeptic with sound doctrine. This man should be firm in the faith, possess learning, and be able to teach others. He should exhibit holiness, wisdom, and discretion. He should rule his own house well and have a good rapport with those outside the church.
There are evangelists/missionaries whose job it is to make disciples of all nations. Even though it is the calling of every believer to profess/confess the Lord Jesus Christ before all men there are some who are specifically called by Christ and His church to be evangelists. The evangelist’s job is to bring in other sheep.
There are pastors (Eph. 4:11; John 21:16).
There are elders and bishops (Acts 11:30; 14:23; 15:2-6; 22-23; 16:4; 20:17; 21:18; James 5:14; 1 Tim. 4:17; Titus 1; Eph 4:11)—and these terms can be used interchangeably based on texts 1 Tim. 3: 1-2 and Titus 1:7 and 1 Peter 5:1-3 and Philippians 1:1) .
And there are deacons (Php 1:1; 1 Tim. 3; Acts 6).