He and Norwegian missionary Lars Olsen Skrefsrud were the founders of Northern Evangelical Lutheran Church—centered in North India - Bihar, Assam, and Bengal - extending into Nepal and Bhutan.
[1][2] Hans Peter Boerresen was sent to India in 1864 by Berlin based Gossner Missionary Society to evangelizing North Indian aborigines.
[1][3] In 1867, he and Lars Olsen Skrefsrud left the Gossner Mission along with Edward Colpys Johnson, from the Baptist Missionary Society.
They started the new mission station to work among aborigines (Santals, Bodos, Bengalis, and Bihari people) on their own.
[1][4] In 1868, he and Skrefsrud settled in Assam where they founded Northern Evangelical Lutheran Church, which centered on North India, with members from among Santals (in majority), Bengali, and Boros.