I am not sure he was saying he was sworn to secrecy so much as he is just not one that likes to be seen as bragging or maybe just doesn't like to talk about it.
I gotcha...usually when I was around them they would just say hey I’m a tacp or pj (or maybe that was JTACs?) They also had it on their sleeve insignia. I appreciate modesty though. I really enjoy his channel. Thanks for the clarification.