In response to @NeoDymium “3. Engineering isn’t always good for night classes. Guess how thrilled your employer is going to be if you start to leave at 12 PM twice a week, and either leave for the day or come back at around 3 PM, because you have a class? Say an important recurring meeting is scheduled during that time as well. People tend to be understanding of school commitments for about the first week or two before your other commitments start to annoy them.”
I can understand this for the most part but just to let some people know that there are places that want you to get your Masters and will work with you on it. Where my son works, an FFRDC, a federally funded research and development center, they let students leave to go to class if they have to because they want you to get an advanced degree. They are very supportive. Plus they pay for it though you do owe them time back.