직원들은

the employees

→ 직원
phrase Rare #29,955
the employees 들 marks plural, and 은 marks the topic of the sentence.
KO: 직원들은 바쁘게 일하고 있어요.
EN: The employees are working hard.

이제 직원들은 나를 알고 있었고, 내가 어느 날 올지도 알고 있었다.

By then, the staff knew who I was and knew I might show up any day.