are there Engineers in Halo: Reach?

Some one asked Bungie, are there Engineers in Halo: Reach?

Bungie graciously answered, Yes. But don’t worry, we’re not going to make you feel like a monster for taking them down this time out and they’re somewhat less of a pain in the ass, all things considered. Even if you don’t have a plasma spewing weapon in hand, you’ll still be able to pop them down from their lofty perches when you notice that your enemies are being overshielded by an engineer floating overhead.

Keen readers will know this was revealed a while back but this is the first decent picture reveal - which was from the Corvette Map.