Translation

1. employee (person who works, together with others, in a particular business or institution) masculine, strong

   Die Arbeitsgeschwindigkeit ist jedem Mitarbeiter selbst überlassen.

   Work pace is left up to the individual employee.

   Alle Mitarbeiter im Vertrieb haben eine Woche lang Tag und Nacht gearbeitet.

   The entire sales staff has worked around the clock for a week.

2. collaborator (person who works with others towards a common goal) masculine, strong
3. assistant (person who assists another person in a business) masculine, strong
4. staff member masculine, strong

   Dozenten und Mitarbeiter

   faculty and staff [at a university]

Declension

Translation

1. assistant source:freedict-eng-deu-dictd
2. accomplice source:wikdict-en-de-stardict
3. staffer source:dictcc-tuchemnitz-de-en