Topics of study include optical properties of nanostructures, engineering concepts of high-power pulsed electronics, high-resolution metrology techniques, particle beam accelerator technology and engineering, electrical power engineering, grid integration of wind energy systems, telecommunications, and internet engineering. All PAs must complete a physician assistant program this is typically a two-year program. Typically this individual is a leader in the field and has been published. Graduates may apply for professional schools, for example, in law, library science, theology, museum curatorship and archival work. By specializing in a respected field, you will be better equipped and able to earn a significant salary in a leadership role. Were you published in journals? It might pay to keep going to school for that extra two years then.