I don't even remember if my first employer (oilfield services company) asked for my GPA. I learned very quickly that GPA was pretty much meaningless in that job. I trained side-by-side with several top-scorers and PhDs who quickly bombed out of the training program, despite their academic credentials, while myself and one other lowly, B-student state university graduate took the top honors in the 2-month training academy, which was, oddly enough, quite academic (tests, homework, etc.) There really is a difference between academic knowledge, and the ability to apply that knowledge in the world outside school.
Then, on top of all that, one of the highest compensated engineers I know is my former roommate from college, who barely graduated because of a low GPA.