An automated system and method of mounting wayside equipment on a surface that is adjacent to railway tracks. A robot is carried by a railway car with an included odometry system. The robot has an articulating arm that can reach between the railway car and an adjacent wall. The robot is provided with working head units. The robot can connect to, and disconnect from, the various working head units in order to perform different tasks. The tasks performed by the robot include scanning the wall for defects and obstructions that may prevent a proper mounting, drilling holes in the wall, mounting bolts in the holes, mounting brackets to the bolts, and connecting electronics units to the brackets. The robot can optionally clean the mounting site and test the mounting site for signal strength.