An elder of the church who commits adultery should be permanently disqualified him from ever again serving as an elder of the church.
This statement may seem to contradict the Christian spirit of repentance, forgiveness, reconciliation, grace, and restoration, yet it remains the biblical truth.
1 Timothy 3 and Titus 1
In 1 Timothy 3:1-7, Paul lays out the requirements for an overseer/bishop of the church, repeated by him in Titus 1:5-9 for elders of the church. In both passages (1 Tim 3:2, Titus 1:6), Paul says that the officer of the church must be a μιᾶς γυναικὸς ἄνδρα, literally a “man of one woman”. This is commonly translated as “husband of one wife” (e.g. the CSB, ESV, KJV, NASB), but some translations have rendered it as “faithful to his wife” (e.g. NIV, NLT). Both of these translations get to an aspect of its meaning, but by themselves are inadequate in capturing the full sense of the phrase.
The idea in Paul’s requirement is not that an elder of the church is merely monogamous, but is faithful in his commitment to his wife. To be an elder you must be a man of one woman, and someone already an elder must remain a man of one woman.