Whatever, Melvin. What type of security do you specialize in?
Right now? Home security, for my wife and kids. I did cyber security for the nation's second largest medical provider, and physical security for some unnameable three letter agencies. Back in the day I handled Microsoft's Redmond campus and several large universities. I've also led red teams which is where companies hire us to deliberately breach their security. That was all a previous life though. Right now I'm into biophysics. I run a music business in my spare time, I regularly get asked to serve as a bodyguard for the names, but I turn most of them down because the risk/reward is too high and I don't like carrying around weapons in Los Angeles.
When you get a professional security credential you learn about the basics. In my cyber days I had to get a CISSP to learn how to protect medical records and financial information. Anything like that, you learn about security architecture and how to design a secure system from the ground up. I've done it all, key fobs, door panels, level 4 mantraps, personnel tracking, intrusion detection, emergency risk management, audits, you name it. I started in San Diego with the Navy in 1980, spent some time in Guatemala running ops, did finsec on Wall Street, courier security for jewels and high value paper, yadda yadda.
I can tell you this relative to our voting system: the easiest way to breach security is to walk in the front door. In my red team days we used to pose as telephone repair men and seduce receptionists and stuff like that. Schmooze with the sales team after work (salesmen like to talk), find out where the local watering hole is and hang out till someone shows up. Have a few drinks and suddenly you know who handles their payroll and which day is payday.
Last year I was an election worker, because I happened to have 11 free days and I was curious as hell how the system really works. I can tell you the problem isn't with the voting machines, it's on the front end right when people walk in the door. And on the very back end where the votes are counted. Everything in the middle is surprisingly secure, LA County has gone to great pains (and spent a lot of money) to make it so.