True women cannot be priests but there are many roles that are pretty high up there that women can do. There are women in high positions on Vatican committees. There are woman who hold high positions in diocesan leadership, such as chancellors, diocesan faith formation directors, office of worship, education, evangelization. There are women who are canon lawyers scripture scholars, moral theologians, and teach in seminaries. On the local level women are directors of religious education for parishes, youth ministers, social ministry directors, visit the sick and homebound bringing them communion. I am a pastoral associate, as such I answer directly to the pastor and take on many responsibilities such as preparing liturgies, spirituality and adult faith formation, RCIA, baptism preparation. I also talk with people who come in when the pastor is not available. I can deal with most issues except anything that requires a priest (such as confession, asking for something to be blessed, etc.) At Mass, women can be readers, servers, extraordinary ministers of HOly Communion, or MCs. These roles of course would only be in the Ordinary Form of the Mass and not the Extraordinary or Latin Mass. So there are lots of leadership roles women can play in the Catholic Church.