top-echelon

To Connolly and Morris, Bulger was a TE, or top-echelon informant, the highest designation in the Bureau for a snitch.

But as part of that top echelon of defense officials, Diskin participated in almost all the meetings where Iran was discussed.

I couldn't quite see the stratified society outlined by Scholar Phelps as holding a position open for her in the top echelon.

His attack on the Management and motion for a censure-vote were dictated from Organization top echelon.