Many years ago, when I was freshly out of active-duty training and transitioning to the one-weekend-a-month drill schedule of the Army National Guard, I landed a full-time job as a phlebotomist with a large blood-collection agency in the Southwest U.S.
However, aside from what I had learned in training as a combat medic (mostly CPR, combat wound care, starting IVs, etc.), I had zero real-world experience as a phlebotomist.