I know some people that self-taught themselves assembly at home. There are probably some online resources to help with that if you want to do it in your spare time.
I'm a noob and won't pretend to have a great knowledge of it, but these guys did develop exploits, reverse engineered stuff, did some malware analysis etc.
I found this short online course in Hardware Security from University of Maryland. I've not done it so cannot attest to the quality or anything, but perhaps look into it? Even if you're beyond it, it might help you refresh something and give you a certificate to put on Resumé if you wanted.
https://www.coursera.org/learn/hardware-security
Good luck!