"Our human engineer is attempting to correct the problem, but we may need assistance."

The other human engineer- the officer- walked up to Nog and offered his hand.

Almost all the "actions" that are currently taken by human engineers fall under this area.

The human engineers simply had to get used to such frustrations.

It will always need human engineers to keep its heart beating.

At the same time, the human engineers are very probably still on the job.

There just might happen to be a human genetic engineer among the time-travelers.

Once the machines could care for themselves, human engineers were no longer required.

Machines, of course, are useless without human engineers to operate them.

And it looks as if the human engineers have now finished their modifications to the helicopters.