noun
ordinary teacher; rank-and-file teacher
Refers to a teacher without a special title or administrative role, such as a classroom teacher who is not a head teacher or principal. Often used in contrast to 教頭 or 校長.
彼は平教員として長年勤めている。
He has worked for many years as an ordinary teacher.
平教員の給与は管理職より低い。
The salary of a rank-and-file teacher is lower than that of a manager.
校長 is the principal, the top administrative role in a school, while 平教員 is a regular teacher.
Compound of 平 (ひら, 'ordinary, plain') and 教員 (きょういん, 'teacher, instructor').