Transgender and gender-diverse people experience prejudice, invalidation, and minority stress. There have been strides towards counselor competency when working with this population, however research is limited in exploring how a counselor can help the cisgender partners and partner dynamics. The research becomes scanter if the cisgender partner identifies as gay or lesbian. “Co-transitioning” is a term introduced by Theron & Collier (2013) that refers to the adaptation process a partner undergoes alongside their transitioning partner (Theron & Collier, 2013, as cited in Siboni et al., 2023). While a trans individual is transitioning, their partner must also renegotiate different aspects of their identity, as well as navigate a new relationship dynamic. Thus, the cisgender partner is engaging in a transition of their own. With limited evidence-based research available, counselors may not be providing competent services to trans partners. Research suggests that the partners who seek counseling services often experience a lack of psychological support (Van Acker et al., 2023). To combat the lack of research and support, this study aimed to answer the following research question: “What is a counselor’s role in helping gay/lesbian, cisgender partners of trans individuals navigate the co-transitioning process?” The goal of this study was to explore this population's needs and how a counselor may assist these individuals through the co-transitioning process.