How does one find an academic career coach?
The only service I heard is "the professor is in" I watched some of their live Facebook videos and learn a lot. Even asked question in here relating their comments about job interview.
Also they provide couching and help with cover letter and statements for possition application with special emphasis on diversity. 
Some members of Academia.stackexchange find them controversial due to unorthodox views on STEM field. But since OP friend is from humanities and whole team is more from that background I highly recommend them.