In general, credit unions restrict their membership to people who work for certain employers. These employers are called SEGs , or Select Employee Groups.
Many credit unions have multiple SEGs.
Just search for the company you work for to see if you might be eligible for membership at a participating credit union. If your employer is not associated with a participating credit union, try companies where your relatives work. When you have found a credit union you may be able to join, check our list of participating credit unions to make sure it's one of the credit unions that participates in the Credit Union Centers.