Ask HN: Job Opportunities for FACS Coders?

Undoubtedly, an average person knowing how to interpret facial expressions and, more broadly, body language and emotions could benefit in many ways in their daily life. However, I am specifically wondering about job opportunities for people intimately familiar with the FACS [0] - whether in tech or beyond. What kind of companies, agencies, or institutions hire these people? What are the possible salary ranges?

[0]: https://en.wikipedia.org/wiki/Facial_Action_Coding_System