licensed teacher; certified teacher
Refers specifically to a teacher who holds a formal teaching license, typically working in public or private schools. More formal than 先生.
彼女は高校の数学教諭です。
She is a licensed mathematics teacher at a high school.
教諭になるには教員免許が必要だ。
To become a licensed teacher, you need a teaching certificate.
She passed the exam and became a certified teacher.
He works as a licensed teacher at a junior high school.
A new teacher in charge of English has been assigned.