This article discusses the recent expansion of the roles assumed by mental health professionals within the field of family law. In the past, mental health professionals working within the family law system, most frequently, worked as neutral child custody evaluators. More recently, articles and conference presentations have described the emergence of other roles such as “review expert,” “consulting trial expert,” “witness support,” or collaborative divorce “coach.” In these newer roles, the mental health professional is retained, not as a neutral, but as an expert for one parent. This article will address the ethical implications present in this work. In addition, the authors will further expand the field by describing the various functions of a “hybrid consulting expert,” the unique contribution provided by this collaboration, and the ethical and practical dilemmas that it creates.