Whose work is baptism?

Baptism is something God does for us. “But when the kindness and love of God our Savior appeared, he saved us, not because of righteous things we had done, but because of his mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit, whom he poured out on us generously through Jesus Christ our Savior” (Titus 3:4-6). “Peter replied, ‘Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. The promise is for you and your children and for all who are far off—for all whom the Lord our God will call’” (Acts 2:38-39). Those passages speak of God working blessings in people through baptism.

God has done the work of salvation. God does the work of giving people faith to enjoy his salvation. To God be the glory!