For a period of more than three years, from 19 December 1994 until 10 January 1998, Kaggwa served as Coadjutor Bishop of Masaka, Uganda.
[1] He was born on 23 March 1943 at Bulenga, Busiro County, Wakiso District, in the Buganda Region of Uganda.
[2][3] Under his leadership the diocese supported development projects including the construction of new schools, homes, shops and farms.
[4] On 6 July 2019, Kaggwa was the Principal Consecrator of his replacement, Bishop Serverus Jjumba as the Ordinary of Masaka Diocese.
Kaggwa was concerned that with mass rallies and canvassing events replaced with virtual campaigning the electorate not be engaged.
[6] On 17 October a prayer event held by Kaggwa for members of the Mbogo Clan at Singo was raided by police and the Ugandan military.