Go to the [Shield generator]
Click on the [Shield interface] to restart the [Shields]
Destroy 13 [Bugs]
Reclick on the [Shield interface] to restart the [Shields]
Go to [-579,149,3117] and defend the base against [Broken Industrialiser]
Destroy all the [Broken Industrialiser] you can see while the [Shield] is restarting
Go back and talk to the [Engineer] at [-618,151,3098]