Don’t expect your coach to necessarily be an expert in your area of expertise. Rather, expect them to be experts in the human development process. Meet with your coach to make certain you feel comfortable, and if you do not, then find another resource. Ask for references and about how long they have been in practice. The chemistry between the two of you must support your goals. Finally, follow up with references and credentials.
Picking the right coach will be one of the more important decisions you make for the benefit of your career, organization, and life, so take time to make sure that you will get the leverage you expect.