Hello, first time poster (can't say im a long time reader) and i've been looking for the answer to a question in regards to Aerospace Engineering. First a bit of background about my degree. I graduated with a bachelor's degree in Engineering Physics with a focus on electrical engineering. I have alot of career interests and control systems is definitely one of them because it can be applied to so many things (electrical/mechanical..even biological). I've taken only two courses related to control systems (i regret that i did not take more) : Introduction to Control Systems (which covers basic stuff like PID, LTI systems, Nyquist plots) and an Introduction to Robotics Course. The intro to robotics course gave me greater background in controls and had a neat project in controlling a simple double-pendulum robot in a simulation using Matlab/Simulink. In doing so, i became familiar with controls being applied to complex mechanical systems as well as "control laws" (Side note: plus my Eng Phys course experience in Classical Mechanics helped me in understanding the Lagrangian dynamics for the robot kinematics/dynamics). So with that being said: I know for a fact that an aircraft cannot work without control systems.. its a fundamental part of how its able to fly. The problem is i dont know enough about aerospace since i was in an electrical-engineering option of Eng Phys. I'm pretty interested about the subject, i've read a few wiki articles about the inertial sensors and the onboard autonomous flight control used for auto-piloting. Through taking robotics i'm sort of familiar with Control Laws and im fairly certain that Aircrafts/Satellites use something similar to plot trajectories but probably use control laws that differ from robotics. Also, the term "Guidance-Navigation-Control" , is it a generic name used specifically for Aerospace control systems? Would my experience in the Intro to Robotics Course be considered "GNC" experience? So with that out of the way: how suitable would it be for someone like me to attempt a career in Aerospace Engineering (with a focus of working with Control Laws / Control Systems)? I've applied to quite a few Aerospace jobs and i get the feeling that they are reluctant to hire someone without the Aerospace knowledge. i'm aiming for entry level positions since im a recent graduate but i'm not having much luck. Another draw back is that i'm not a American Citizen and i'm seeing tons of opportunities in places that require a security clearance / US citiznship. Any thoughts, suggestions, books, recommendations are welcomed.