Disassembles, repairs, rebuilds, modifies, tests, troubleshoots, and installs the more complex hydraulic and pneumatic systems designed to adjust automatically to factors such as temperature, humidity, pressure, or rate of change of velocity, or have sensing devices that feed back into the system information on the systems performance. The primary purpose of this position is to dissemble, repair, rebuild, modify, test, troubleshoot, and install more complex hydraulic and pneumatic systems designed to adjust automatically to factors such as temperature, humidity, pressure, or rate of change of velocity, or have sensing devices that feed back into the system information on the systems performance.