Excellent talk about how to Deal with the toxic engineer.
Things are very different here in the eastern side of the Atlantic Ocean: you cannot fire an employee because you want to, you only can fire an employee as the very last resort . Firing an employee in Spain usually is a pain in the ass for the company. The company must have things clear to take this decision.
So if you have the very bad luck to contract a Toxic Engineer for your team, may be you cannot fire him, and you have to pay him until he leaves the company. Usually too late to save other employees for being intoxicated too.