No, he doesn't even need a degree in theology. God's man, a true shepherd, is called by Him, anointed by Him, taught by Him, and set by Him. Moreover he must have a good report of them which are without. God's true shepherd, the true man of God, will be known and recognized by his character . I n addition to Godly character, a true shepherd has the responsibility of protecting the congregation from sin.
Sin is like a cancer.
If left unchecked it can spread and destroy souls in the Body of Christ. Except a man be born again, he cannot see the kingdom of God. Jesus Christ is the only way unto the Father. He is the only way into heaven. No religious ceremony, no amount of money, no number of good works, no prayers of people alive or dead can get you into heaven.