Mark Jantzi has been preaching and teaching the end-time gospel of the Kingdom of God for the past 35 years, beginning in the Adirondack Mountains of New York State and then coming down to the metropolis of the Capital District of New York. With his wife Rita, they minister to the local fellowship (Adirondack Christian Ministries) in the Schenectady region. Brother Jantzi is one of several elders in the local fellowship.
In addition to the local ministry, the Jantzis travel quite extensively to Europe, Africa and the Asian Pacific, conducting mission work with other brethren in the founding of other fellowships/churches in the end-time message of the Kingdom of God. Their ministry is mainly to the church, in preparing the bride for the coming of Jesus Christ, in bringing God’s people into full sonship, and preparing the people for the difficult and perilous times that are fast approaching this world.