I'm a bit confused by this. I've never worked a union job, so I'm not entirely familiar with it. But I thought a lot of the unions in the US were cross-company. United Auto Workers. International Brotherhood of Electrical Workers. Screen Actors Guild. Service Employees International Union. International Alliance of Theatrical Stage Employees. National Education Association. American Federation of Teachers. Teamsters. United Food and Commercial Workers. Air Line Pilots Association. All of these are cross-company unions, and they're the ones I hear the most about.