Genealogists are generally not required by law to be licensed or certified. However, they can receive credentials from several organizations. Each organization sets its own criteria for granting credentials. The reference section at the end of this guide includes two major organizations that grant credentials and offer arbitration if problems arise. 

 

You should also consider other criteria as you make your hiring decision. Most genealogists are self-taught, and many competent genealogists do not seek credentials. Years of education, research experience, and satisfactory service to clients may be just as important as credentials. 

 

https://familysearch.org/learn/wiki/en/Hiring_a_Professional_Researcher