The phrase "member of staff" can be replaced with several other terms, including "employee," "staff member," "worker," and "team member." Additionally, depending on the industry and specific role, other synonyms could include "executive," "specialist," "associate," or "assistant." It's important to choose the correct synonym based on the context of the situation and the intended message. Using the appropriate term can help to convey a higher level of professionalism and respect for those who are considered members of a team or organization.