Welcome Erik!
I think this is entirely possible, however it will require some coding work on your end. You want to look into setting up a method directive, and use the directive to update the UD fields in your new split job. You can do the engineered/released through directives as well.
Now finding the correct method to latch on to is the tricky part. I am thinking there will be a specific method related to splitting the job. Run a trace, and parse it out to see what methods are firing.
If you have not run a trace before, there are lots of topic on here about that. Once you have the trace, you can parse it out using a handy tool another user on here made:
Trace Helper Utility for Epicor ERP 10 (I must have linked this tool a hundred times by now! It is a must have!)
Good luck!
Nate