I would welcome any tips on how to manage a direct with sociopathic behaviour.
This is not a diagnosis, of course, but the described behaviors of a sociopath fit very well to my direct. No empathy, control freak, thinks he is a genius, talks and talks and talks, but does not communicate. Knows best - any topic, etc. Undermines authority, cause he knows best and puts down my other colleagues, myself and even my boss (the CEO) in emails with a large list of recipients. He holds on to key knowledge within the company and avoids sharing information. To getting rid of him is not an option.
How do I deal with this guy? How can I work on his offensive and demeaning communication style, mainly via email.
Any help appreciated.