Though the Bible gives us several qualifications for ministry people in the local church, what are the two fundamental qualifications for leadership ministry (i.e. Pastor, Evangelist, Teacher, Elder, Deacon)?
The person must be a believer (saved, born again, converted, justified).
The person must have his heart purified by the fulness of the Holy Spirit.
There are several qualifications which require personal obedience, submission, denial, self-discipline and self-control, in other words, obedience and growth. Qualification for service is not only what God does in us at the moment of our conversion and the moment of our Holy Spirit Baptism; it is related to our continued surrender and pursuit of God's presence and blessing.
The two fundamental qualifications are faith-related to the saving work of God. Being regenerated and receiving newness of life by the Holy Spirit and having our hearts purified by the Baptism with the Holy Spirit. Being born of the Spirit and being infilled with the Holy Spirit is not a matter of spiritual works or personal accomplishments, but it is the result of trusting God to accomplish in us, works of grace, which are essential to our salvation.
Christians are not fit to "go into all the world" until we tarry in Jerusalem to be endued with power from on high," which happens when the Holy Spirit purifies our hearts by faith, as He did on the Day of Pentecost. The Baptism with the Holy Spirit is not evidenced with speaking with a new tongue, but it is evidenced by a heart purified from all sin.
Be sure to call on God for your justification and your sanctification and then be sure to walk in the light He gives you, so that you might grow in the grace and knowledge of Christ. After our regeneration and our purification, we are being conformed to the image of God's own Son.