 On 10 February 1962, Pope John XXIII appointed him Apostolic Delegate to Thailand and the Malacca Peninsula, as well as Titular Archbishop of Nicopolis ad Nestum.His episcopal consecration took place on 24 June 1962.The principal consecrator was cardinal Amleto Giovanni Cicognani, and the co-consecrators were Archbishop Leone Giovanni Battista Nigris and Bishop Patrick Joseph Dunne.