To an instructor means to under the process of training and qualifying as a teacher or trainer in a particular subject skill, or activity. Full definition
Depending on their individual strengths, dental assistants may become instructors in the schools through which they have passed, or office managers. (careertoolkit.com)
I graduated as a Medical Assistant in 1999, worked in reputable clinics and eventually became an instructor at a private college. (indeed.com)
I worked with this competition company for dance and became an instructor for children. (livecareer.com)