[reply00000r1]

Can you just reject all their changes from being pushed to production until they meet standards?

If you are the tech lead, don't you review all his changes? Just stop letting him add anything to the production code.

Give them a warning, document the constraints and say: "I am not able to add any of your contributions to the project going forward. We will be reviewing your inputs to the code on an ongoing basis. The quality of the work is unacceptable. I am not going to be arguing with you any further. Here are the standards. Anything that doesn't follow these is going to be rejected. IF you are unable to follow these, then I recommend transferring."

Then let him take a vacation and push no code and then slap him with a PIP.