CG66

Hello All, I am applying to grad schools for Neuroscience. I am trying to find out who I would like to write letters of reference. I have 2 people already, professors, but I was wondering if it would be appropriate to ask my boss. I currently work at a University/Medical school, as a lab tech, and do various things around the lab. Should I just find another professor? What do y'all think? Thanks in Advance