He was essentially one who operated behind the scenes rather than on the front of the stage.

Until then, he is the face of the company and its voice, an awkward position for someone who has chosen to operate behind the scenes.

Those elite units are often used to operate deep behind enemy lines.

To her surprise, she felt no guilt at all about operating behind Jake's back.

What should an ethical person think when asked to operate behind a colleague's back?

The bombers'll be operating behind enemy lines all the time, right in the bad guy's face.

And he was doing all this while operating behind enemy lines under an assumed identity.

Several have closed and the two that remain now operate behind locked doors.

They could even operate behind enemy lines, and later be extracted by air.

But the last time was a year ago - I spent a month operating behind enemy lines.