I once worked in a large open-air office that had on-site support from VMWare (this was over ten years ago). The VMWare guy was a doofus and some of the 20 something year old IT staff appeared to know more about his product than he did. Provided no-value except for "knowing people"...One day he wasn't there and I asked if they finally fired this useless bozo and I was informed that he went to work with Redhat-support and that a new VMWare guy was inbound. Shook my faith in RHEL for years. Honestly I'm still not sure I trust Redhat after they hired such a loathsome fraud.