Gervas John Mwasikwabhila Nyaisonga (born 3 November 1966) is a Tanzanian prelate of the Catholic Church.

[1][2] In 1983 he entered St Joseph's Minor Seminary in Kaengesa in the diocese of Sumbawanga, for the classes of superior preparation for priesthood.

He then entered St Charles Lwanga Major Seminary in Dar-es-Salaam, in 1991, where he studied Theology.

[2] He studies at the St. Augustine University of Tanzania (SAUT), from 1998, graduating in 2001 with a Bachelor of Arts degree in the Science of Education.

Between 2006 and 2009, he studied at the University of Dar-es-Salaam, graduating from there with a Master of Arts degree in Social Sciences.