Originally Posted by ronm
I had not heard of the term, but from your description I suggest "rank and file" employee (often hyphenated: rank-and-file). The term originated in the military, from the formation of troops in ranks (rows) and files (lines). Officers were not part of the formation. The term has come to mean the large body of members of any organization, excluding the leaders.
Example: Recently, Congressional leaders have been trying to raise support for the bailout scheme among the rank-and-file members of Congress.