Overseer is another New Testament term for the office commonly called bishop.
The word emphasizes the responsibility of spiritual supervision and care within a local church.
Overseers are entrusted with guarding sound doctrine, leading the congregation, caring for God's people, and protecting the church from error. The New Testament uses the terms elder, bishop, and overseer interchangeably for the same office.
See in Scripture: Acts 20:28; 1 Timothy 3:1–7; Titus 1:7–9; 1 Peter 5:1–4