When looking for a divorce mediator, you should look for qualities like good communication skills, compassion and empathy, respect for both parties involved in the mediation process, unbiased objectivity with regards to decision making. Lastly make sure the person has experience dealing with divorces specifically so they're familiar everyone's legal rights and understanding of how processes work during this complicated time.
To ensure that the mediator is qualified to help you with your divorce, do some research into their qualifications and experience. You can also ask them for references or read reviews of their services online.