I applied to a then nascent part of McKinsey (that is now very mature) called Digital McKinsey, as someone who could help clients build and transform engineering and product organisations. To be a CTO/VP Eng for hire, almost. Then I slowly moved more and more into the non-tech topics.
I was there for almost exactly four years. Learned all kinds of things, but most importantly how to communicate and structure my thinking in a way that works with people senior people from non-tech backgrounds.