 O'Collins organised and co-chaired international ecumenical symposia on the Resurrection (1996), the Trinity (1998), the Incarnation (2000), the Redemption (2003), and the legacy of Pope John Paul II (2008), also co-editing their proceedings.He returned to Australia in 2009.O'Collins has been an honorary visitor and a visiting scholar at Pembroke College, and he currently serves as an honorary adjunct professor at the Australian Catholic University.