Jude Thaddeus Ruwa'ichi was born on 30 December 1954 in Mulo-Kilema, in the Diocese of Moshi, Kilimanjaro Region, Tanzania. He joined the Capuchins and was ordained a priest on 25 November 1981. He has served as a member of the order's governing body (General Definitorium).[1]
On 10 November 2010, Pope Benedict XVI appointed him Archbishop of Mwanza.[3] In 2014, he participated in the launch of a program for the prevention and treatment HIV combined with efforts to prevent discrimination against people living with HIV. The program was based on a partnership with government agencies with NGO funding.[4] He also served as Apostolic Administrator of the Diocese of Shinyanga from 2013 to 2015.[2]
Pope Francis appointed him Archbishop Coadjutor of Dar es Salaam on 21 June 2018.[2] Ruwa'ichi became Archbishop upon the retirement of Cardinal Polycarp Pengo on 15 August 2019.[5][6]
In March 2019, while announcing a partnership with private insurers to provide life insurance as they had health insurance, he challenged them to address education insurance to allow families to finance education with less dependence on sponsors and patrons.[7]