The new bishop attended the Second Vatican Council from 1962 to 1965, missing only Session Two running from 29 September 1963 to 4 December 1963.
[3] Between February 1966 and 29 May 1969 he served as the first Apostolic Administrator of the Roman Catholic Diocese of Kabale in Western Uganda after it was just established in ecclesiastical province of Mbarara.
In Uganda he was revered notably for his evangelical simplicity and persuasive personality which made him an ideal leader.
He remained in this position until his resignation on 26 November 1973 when he joined the Monastic Order of Saint Benedict[6] in Hanga, Songea.
[7] On 28 December 2015 Nkalanga died in Peramiho, Songea, a Benedictine abbey in Southwestern Tanzania.