A PCB Designer needs to have a professional PCB Design software that is able to lay down and test the proposed PCB Design. The same software should be able to allow the PCB Designer to put together the PCB Schematic into a PCB Board that can be turned into a physical PCB by submitting the resultant files to a PCB Factory.A PCB Designer must be willing to take time and consistent practice to grow from one level to the next.
This introduction of some pcb design software-The pro's and con's are discussed, cost, where to download, and an example.You can learn a lot in this set of articles.
Even though PCB Designers can specialize in either schematic layout or PCB layout, it is highly recommended that a PCB Designer frequently does the whole PCB Design process and also getting the boards printed and tested in professional PCB manufacturer,so as to experience the practical results of their labor.
PS: All the contents are from the network.