An acquaintance who worked as a DIA analyst with SOCOM lost his career over unsubstantiated polygraph chart readings and was diagnosed with PTSD. He was subjected to multiple polygraph interrogations and, relevant to the original poster’s inquiry, admitted having researched polygraphy, which was held against him. For any who might be interested, he has discussed his experience here:
https://antipolygraph.org/cgi-bin/forums/YaBB.pl?num=1487351318