I had the extreme pleasure of taking one of Jay's courses at Black Hat. This being "Aikido on the command line: Linux Hardening and Containment". Let me first start off stating that I used Bastille Linux to help harden my systems when I ran my own ISP a few years back. His insight into hardening a Linux endpoint was probably the best advice out there at the time. Thus why I utilized Bastille.

Taking the class at Black Hat (2017) gave me the opportunity to tune up on these skills as well as learn new ways to harden Linux Containers as well as Linux endpoints. This class was top notch in my opinion only because of Jay's in-depth knowledge and hands on experience in hardening Linux but also the way he delivers himself as mentor. I could not have asked for a better mentor as well as peer to be my instructor in this class. Jay's knowledge was astounding. I would strongly suggest to anyone that if you are looking for an instructor, in-depth knowledgeable person, dead on accurate Hardening and Security person, you just found it in Jay Beale.