I only finished two years of school in engineering before going full-time. A couple years into it I regretted not finishing school, so I went to a community college and picked business administration as a degree doing it completely online. I received my associates and transferred to a state university. I'm six classes out from my bachelors degree, I should be done next year. After that I'm either going to get my masters or go back now that they offer engineering online and finish that degree.
It's not easy depending on how many classes you take. I usually take two classes a semester or one if I want to take it easy. You get an hour for lunch that you can do homework, which I don't, and when there are projects or exams to take I call out sick to make sure I keep up my good grades. It's tough with the job but the 9.5 list is a beautiful thing and you can still have a personal life and complete school while going full-time.