Every aircraft has a lot of electronic instrumentation devices. There are dozens of gauges in the cockpit and pilots need to master all of them. However, these instruments will not be of any use if they are not functioning well. By hiring the best military avionics experts, the military can be assured that their pilots will be flying safely wherever they go. Avionics basically covers every electrical system that is installed in an aircraft. This includes the lighting, instrumentation, warning systems, air conditioning, sensors, ignition system of the engines and everything else that draws electrical energy from the power system.
The military usually trains its own avionics professionals, but they also hire engineers who have studied avionics to join the service. After leaving the military, these professionals can easily find work in the private sector as most firms usually give preferential treatment to professionals who have been honorably discharged from the military.