I don't really understand what you're asking - you want an office job over the course of two semesters that you are taking off? You're concerned that you want to continue the job after returning to school? First thing is to compile a good resume, and then hand it out to potential employers, followed up by an interested phone call in a week or so. At your interview, be clear about your hourly expectations and where your schedule is apt to change.
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Dancin' in the desert, blowin' up the sunshine...