Some mechanical engineers are "professional engineers". That title is a legal liability for messing up. While most of the work designing a skyscraper belongs to any civil engineer, it won't be built until a professional engineer puts his legal mark on it being safe. In turn a professional engineer has the power and legal responsibility to tell management no and he will win against all their pressure. (though sometimes that means the company builds nothing and goes out of business forcing him to find a new job)