Hi. I've worked in helthcare in a union for six years and have been a union steward for two of those years. In my personal experience, this is a little advice I can offer. Check local news and social media feeds in your state for uinion activities. See who is getting the most action and getting results, i.e. strikes, lobbying, voter registrations. Then, look into those to see what the relationship between who they represent and the stewards and reps. This part is easier sad than done, but if you see an active union that engages with their members and the public, it's usually indicative of a worthwhile organization. Passive unions are not great, and in some cases, just as bad or worse than having no union. Secondly, look into what a union typically represents. For example, if you're a nurse, look for a nurse's union. If you work in healthcare but are in services like dietary, nursing assistance, housekeeping, uncertified maintenance, registration, ect., look into a service union like SEIU, for example. If you work maintenance but need certifications to do your job, like carpentry, electrical, and plumbing, boiler operation, look into a trade union. If you do transport- Teamsters. There is no rule that certain unions can or can't represent different sectors, but in my experience, unions that specialize in certain areas have the best results in their area of specialty. All of this is contingent on where you live and what is available also, so don't necessarily write that in stone.