The initial missionary presence of the SMB in Peru was an ecumenical project, which consisted of expert monitoring of fishermen in the port town of Callao.

This became the starting point of a holistic missionary proclamation and development work among the indigenous communities of the Altiplano and in the slums of the capital Lima.

From 1997 – 2013 Andreas Wettstein worked as prisoners chaplain in various prisons of the country.