Did you file a regular online application, or for the college program or something else? I completed an on-line application in mid-December for a particular role in which they had no openings at that time. I was notified by email in April that they wanted me to complete the initial online interview (series of multiple choice questions in a timed format). After passing that interview, I was immediately scheduled for a face to face interview about one week later. At that interview I was scheduled for a secondary interview in late April. I was hired after that.
Currently, DLR only has a limited number of part-time jobs advertised. You can apply to DLR once every six months. Did you put down that you were willing to work part-time, with full availability for more than one role?
Good luck to you!