This is not what TFA is about, but: https://en.wikipedia.org/wiki/Bujinkan https://en.wikipedia.org/wiki/Bujinkan In terms of career options, I know there is

This is not what TFA is about, but: https://en.wikipedia.org/wiki/Bujinkan https://en.wikipedia.org/wiki/Bujinkan In terms of career options, I know there is at least one group within the US Marine Corps, and a private military contractor in San Francisco which recruits from their own dojo.