Women remain underrepresented in the coaching domain across various levels of sport both in Canada and internationally. Despite the use of mentorship as a key strategy to support female coaches, little progress has been seen in achieving parity. At the same time, greater advances in gender equity have occurred in other non-sport sectors such as business, engineering, and medicine. The purpose of this study, therefore, was to learn from non-sport domains that have seen advances in gender equity to inform mentorship for women in coaching. A mixed-methods methodology was employed and consisted of distributing mentorship surveys to female coaches (n = 310) at various competitive levels, representing current (88%), former (12%), full-time (26%), part-time (74%), paid (54%), and unpaid (46%) coaching status. In addition, eight in-depth semi-structured interviews were also conducted with women in senior-level positions across various non-sport domains, including business (n = 1), media (n = 1), engineering (n = 2), higher education (n = 1), law (n = 1), and medicine (n = 2), regarding the role of mentorship in advancing women in their field. A descriptive and thematic analysis of the survey and interview data were conducted and findings are interpreted to suggest considerable variation in the characteristics of female coaches’ mentoring relationships, as well as the need to move beyond mentorship to sponsorship for advancing women in coaching. Recommendations for future research and advancing women in coaching are provided.