Modern battles involve expensive, complicated machines, and it is inevitable that these machines sustain enemy-inflicted damage, succumb to driver error, or simply break down of their own accord. It is the mission of the Techno-Vipers to provide field maintenance support and combat-engineer capability to the frontline Cobra troops. Techno-Vipers can repair HISS tanks, build bridges, and retrieve large, heavy machines from seemingly inaccessible places. They are trained to rebuild and retrofit anything from weapons to fortresses. They use whatever materials they have on hand, and send troopers to "take" what they need to complete their project. Their engineering creations are usually powerful, effective and full of deadly surprises.