In January 2006, Plunkett was appointed Australian Ambassador to Ireland, with concurrent accreditation to the Holy See. Her Holy See appointment was formalised by Pope Benedict XVI on 18 May 2006 when he accepted her letters of credence.
In January 2006, Plunkett was appointed as Australia's Ambassador to Ireland with concurrent accreditation to the Holy See. Her appointment to the Holy See was formalized by Pope Benedict XVI on May 18, 2006 after he accepted her credentials.