CPT is doubtful!

First, you must attend a program that is closely related to your current job. That means, if you have a MS in CS, you need to be in PHD in CS, or probably MS in EE will work.

Second, even if you get into a program. I doubt the school will give you CPT in the first semester. Most schools won't give you until one year full-time study.

Third, even if you get CPT, which in my eyes is very impossible, you can only work half-time. And how would you manage a full-time study at the same time?

Try to think other ways! Good luck.