A Leader in the church has to hold themselves to a higher standing at church, the community, and at home. The main positions is the pastor (overseer, bishop, or elder) and deacons. The majority of the standards has more to do with character than duties. People can learn how to do a job, but character comes from within. If they do not have a strong relationship with God, then the character will reveal that.
Pastors are teachers. They teach the church on spiritual matters affecting life. Deacons are to serve the church. They help settle disputes, wait on people, and serve in whatever capacity is needed. They minister to the church through action. Together the pastor and the deacons take care of the church flock. They uphold church ordinances and hold the church accountable to do the same. The main ordinances to be upheld are baptism and the Lord's Supper.
Baptism is not required for salvation, but it is the first act of obedience as a Christian. If you can't do that simple instruction, then how can God ever trust you with something bigger. It only needs to happen once because once saved always saved. Once you fulfill baptism, then you can start moving forward in maturing as a Christian.
The Lord's Supper represents how Jesus became the sacrificial lamb for the church. It also reminds the church of Jesus' last supper. It points forward to your relationship with God and waiting on Jesus' return. This act of remembrance could happen every week, once a month, once a quarter, or once a year. It is important to be a part of church where leadership makes baptism and Lord's Supper import for membership.
Matthew 26:26-30, Mark 14:22-26, Luke 22:14-20, Acts 6:1-7, Romans 6:1-11, Colossians 2:11-12, 1 Timothy 3:1-13, Titus 1:5-9