Sunder was born into an orthodox Hindu family in India and grew up in the capital city of New Delhi. Sunder came to know Jesus Christ as his Savior through the ministry of Youth For Christ during his first year of university. He is a graduate of the Indian Institute of Technology and received his M.S. in Mechanical Engineering from the Massachusetts Institute of Technology.

After a career in safety analysis with Atomic Energy of Canada, Sunder joined the pastoral staff of Rexdale Alliance Church in Etobikoke, Ontario in 1980. Sunder has served as the Senior Pastor at Rexdale since 1997.

Sunder speaks at colleges, missions conferences and concerts of prayer and has been the featured speaker at The General Assembly of The Christian and Missionary Alliance in Canada, The General Council of The Christian and Missionary Alliance in the United States. In addition, he has ministered overseas to many missionaries and pastors. Sunder and his wife, Shyamala, have been married since 1971. They have two grown children, Vijay and Sheila, and five grandchildren.