Calson is married and has four children. He felt the call of God when he was 22 years old. He was then trained and ordained while working with the church. Today he is training pastors and church leaders around Zimbabwe in all ten provinces. He has helped to train over 3000 pastors so far. He has helped to care for over 300 orphans in the past few years. Currently, he is helping 100 orphans with school fees and uniforms, and has helped place many of them in Christian families.