Instructors may work at a riding school or training centre/college, or may be freelance and travel from stable to stable.
Many instructors are not qualified but in Britain there are two recognised bodies awarding qualifications: the BHS (British Horse Society) and the ABRS (Association of British Riding Schools).
Become a Certified Horseback Riding Instructor
The Process of Teaching Therapeutic Horseback Riding.
Horse Riding Instructor
Finding a Horseback Riding Instructor
The work of a horse riding instructor