There are many different ways to express the concept of "worked in." One possible synonym is "employed in," which conveys the idea that someone was formally hired to work in a particular field or occupation. Another option is "engaged in," which can be a more general way of describing someone's work activities without specifying a particular job or profession. Other alternatives might include "participated in," "contributed to," "served in," or "occupied a position in." Ultimately, the choice of synonym will depend on the specific context and intended meaning of the sentence or phrase in which it appears.