English to Arabic Other Business/Commerce (general)

Hello everyone,
what exactly does the staff officer do in companies? All the information I found was related to that position in the army. Is it equal to manager with regards to companies?
Here is the context:
This second scenario I have probably seen two dozen times. The biggest champion of change is the human resource executive, the quality officer, or the head of strategic planning. Someone talks the boss into putting this staff officer in charge of a task force that includes people from a number of departments and an outside consultant or two. The group may include an up-and-coming leader in the organization, but it does not have the top three or four individuals in the executive pecking order. And out of the top fifteen officers, only two to four are members.
Thanks in advance.