Grace was a pharmacist owner in Scarborough until 1998. Responding to God’s call and a desire to pursue theological education, she enrolled and received a master’s degree from Tyndale Seminary in Old Testament. She then did her doctoral studies at Wycliffe College in the University of Toronto, and obtained her Ph.D. in Theology from the University of St Michael’s College in 2009. Apart from teaching at Tyndale Seminary and Canadian Chinese School of Theology at Tyndale Seminary, Professor Ko has preached and taught at different churches. She is also an adjunct lecturer at Canadian Chinese School of Theology at Ambrose Seminary.