An Austrian priest and theologian has resigned from his position at the Congregation for the Doctrine of the Faith, amid charges that he made sexual advances toward a woman in the confessional several years ago.

The priest maintains his innocence.

Fr. Hermann Geissler, 53, has been an official within the CDF since 1993, and in 2009 became the head of the congregation’s teaching office.

A statement released on January 29 said that Geissler “affirms that the accusation made against him is untrue, and asks that the canonical process already initiated continue. He also reserves the right for possible civil legal action.”