Isaac Mall has been Church Organist, Pianist and Choir Director more than 55 years and served many Churches as Choir Director and Organist at Church of Pakistan, Bahawalpur. Christ Church Drigh Road, Karachi. Central Church 74 Garden Road, Karachi. Trinity Church Karachi. St. Andrews Church Karachi. Karachi Convention Choir Director. And in California St. Andrews Church Oakland, Geneva Avenue UMC San Francisco, First Temple UMC Martinez , Community Presbyterian Church Vacaville, First Baptist Church Vacaville and many Churches as time to time. He produced the  First ever Christian Tape in 1976 through EMI Karachi Pakistan. There after many.