It’s doable, but not easy. He will need to maintain good grades and take the required classes to transfer. Read this, https://admissions.tc.umn.edu/transfer/cse.html
According to their website he’ll want above a 3.62 GPA to be as competitive as possible for CSE.
Here’s CSOM’s requirements, https://admissions.tc.umn.edu/transfer/csom.html