The laser-assisted double-wire welding process with nontransferred arc (LDNA) is used for Additive Manufacturing of big structures or for large area cladding of components. The process is characterized by a high deposition rate of 5–20 kg/h. For the mobile application of the process using a robot with a maximum payload of 6 kg, the goal was to develop a compact processing head weighing a maximum of 5 kg. A key element is the beam guidance system, which consists of a single-axis galvanometer scanner that must be located in an encapsulated housing due to process emissions. The welding torches, which form the second important element, are brought into position by a torch holder that is adjustable relative to the laser beam. This paper describes the development of a compact processing head for the mobile application of the LDNA process with a robot and the subsequent testing.