The Mission and Evangelism Ministry exists to fulfil Christ's Great Commission by proclaiming the Gospel, making disciples, and sharing God's love with people both within and beyond the parish. Inspired by Matthew 28:19–20, the ministry seeks to lead people into a personal relationship with Jesus Christ while equipping believers to become faithful disciples.

The ministry organizes evangelistic outreaches, community missions, home fellowships, discipleship classes, prayer initiatives, and partnerships that extend the church's ministry into schools, hospitals, homes, and surrounding communities. Every activity is designed to demonstrate God's love through both word and action.

Mission and Evangelism also encourages every member of St. John's Church to see themselves as ambassadors of Christ in their families, workplaces, schools, and communities. Through training and mentorship, believers are equipped to confidently share their faith and live as witnesses of God's transforming grace.

As a mission-minded church, St. John's remains committed to reaching the lost, strengthening believers, and impacting society through the life-changing message of Jesus Christ.