a little frog in a big pond
Someone within a large operation or organization who is less important or less qualified than those around them. This thankless IT support job is really getting old. Ever since I started here, I've just been a little frog in a big pond.
little frog in a big pond
Also, small frog in a large pond. An unimportant or unqualified individual in a large organization or other setting. For example, Coming from a small school, Sandy felt lost at the state university-a little frog in a big pond . This phrase is the counterpart of big fish in a small pond.