Looking for a Qualified Marriage Counselor (Non-Legal Family Mediation

We are seeking a qualified and experienced marriage counselor or family mediator to communicate with my brother's wife's family on his behalf, either through a phone call or an in-person meeting. This matter concerns certain commitments that were made before the marriage and were not fulfilled. Our objective is to facilitate respectful and constructive dialogue in the hope of resolving the issues amicably. At this stage, there are no divorce proceedings or court cases involved, and we are not seeking legal advice or legal representation. We are specifically looking for a neutral marriage counselor, relationship counselor, or family mediation professional who can help both families communicate effectively and work toward a mutually acceptable resolution.