practitioner

This term carries a sense of applied skill rather than theoretical knowledge. It describes someone who is in the trenches of their field, executing the daily tasks of a vocation rather than researching it in a lab or teaching it in a classroom. In modern usage, it is most frequently associated with healthcare, often acting as a formal alternative to doctor or therapist. However, it can also apply to spiritual or traditional arts, such as a practitioner of Zen or a practitioner of acupuncture, where it implies a lifelong commitment to a discipline.