This article provides a comparative examination of teachers' experiences of both participating in Catholic teacher education programmes and teaching within Catholic schools in the Republic of Ireland and the United States. This mixed-methods study consisted of surveys and interviews with 22 teachers who are graduates of both Irish and US teacher education programmes and have taught in Catholic schools in both countries. This distinct cohort of Irish Catholic educators reveals how faith and Catholic identity are experienced in two distinct education systems that share a common mission. The research underscores how context powerfully shapes the lived experience of teachers in both Catholic teacher education programmes and in Catholic schools, and it highlights implications for those responsible for Catholic teacher education programmes and also for the leaders of Catholic schools. The extent to which members of a school community explicitly identify and choose to embody the Catholic identity greatly shapes outcomes.