an instructor or adviser who is responsible for teaching or guiding during training or classes
スキー教室の指導員が初心者に基本を教えた。
The ski class instructor taught the basics to the beginners.
新入社員は指導員のサポートのもとで仕事を覚える。
New employees learn their jobs with support from an instructor.
指導員に相談して練習メニューを作ってもらった。
I consulted an instructor and had a training plan made.