When think of Engineers in video games I always think of the sentry creating ones in
Team Fortress 2. I know that's odd but given the months I've spent playing the class that's somewhat expected.
Mass Effect 2 will also have an engineer class and it looks like they are a bit more of the master haxxor type engineer as they can hack enemy units as well as creating robotic drones. I'm not sure that's the class I'll be playing as I'm more of a shoot first and think about tactics second kind of guy but it's a nice option for those thinkers out there.