The job duties of a phlebotomist volunteer include collecting blood samples or taking blood for blood bank donations. Depending on the details of the volunteer opportunity, your responsibilities may include transporting samples to labs for tests, recording and filing data for each patient or donor, and observing procedures to ensure the health and safety of yourself and your patients or donors. Volunteers work in a local community, for a neighborhood health center or a Red Cross blood bank or similar organization. A phlebotomist can also volunteer abroad in areas with limited healthcare services.