expression, ichidan verb
quit one's job; leave a company
Standard expression for resigning from a company or quitting one's job. The verb 辞める specifically means to resign or quit (a position).
来月、会社を辞めることにしました。
I've decided to quit my job next month.
彼は突然会社を辞めて、留学
He suddenly quit the company and went to study abroad.