I am and actually practiced for awhile. He's a malignant narcissist. There may be bits of other stuff in there too, but that would be his primary disorder.
Malignant narcissism is a psychological syndrome comprising an extreme mix of narcissism, antisocial personality disorder, aggression, and sadism. Often grandiose, and always ready to raise hostility levels, the malignant narcissist undermines organizations in which they are involved, and dehumanizes the people with whom they associate.