To give an example, he probably can help a lot of big companies just with their authentication policies. Accountants are ignorant about these things and maybe he could for example be asked about when to use a password and when to use some kind of token, how to setup access to EC2 or Azure virtual machines and things like that.

I know these in principle should be simple. But the man is a rock star and should be able to cut through a lot of the bureaucratic BS.