I won't work for them again like I did before

[Alexey86]

I won't work for them again like I did before (= I used to work for them, but I won't do that again).
(my example)

1) Is the sentence correct?
2) If it's correct, does it provide the intended sense? Or, would it be read as I won't work for them the way I did before?

 

[teechar]

Or, would it be read as I won't work for them the way I did before?

Yes, that's the more likely interpretation.

(= I used to work for them, but I won't do that again)

If that's what you mean, then try:
I won't (ever) work for them again.
or
I'll never (ever) work for them again.
Note that "ever" adds more emphasis.

 

[Alexey86]

Yes, that's the more likely interpretation.

What do you think of this variant:
I won't work for them, which I did before.

 

[teechar]

It's possible.