The company or workplace where one gets a job (or will work); a place of employment.
来月からの就職先がようやく決まった。
My place of employment starting next month has finally been decided.
就職先を選ぶときは通勤時間も考慮した方がいい。
When choosing a place to work, it's better to consider the commuting time as well.
彼女の就職先は地元の銀行だと聞いた。
I heard her place of employment is a local bank.