Utility Workers Union of America
AFL - CIO Local 127

What can sometimes make life in a union tricky is that the membership does not consist of people with 100 percent identical interests and needs. Within any group, there are some things that everyone has in common (like everyone in your union working for the same employer), but also other things are different (like night shift workers wanting extra pay for working at night, or day workers needing better parking). Sometimes only one employee has a workplace problem requiring union help, such as fighting a disciplinary action. But even though it’s just one person, the union must still advocate for that individual. And the union’s voice must be heard, as well, for all the different smaller groups of employees in the workplace, whether those groupings are based on shift, work classification, age, how much money people earn, or any other employment-related factors.
-- Adapted from The Union Member's Complete Guide, by Michael Mauer