He was born in Härnösand, the son of Archbishop Mathias Steuchius (1644–1730) . His family surname was ennobled in 1719 to Steuch.
He was enrolled at Uppsala University in 1692 and in 1695 at Lund University. Steuchius received a doctorate in philosophy at Uppsala in 1700 and in 1701, he took up a position as professor and librarian at Lund University. In 1707 he returned to Uppsala University where he was appointed professor of metaphysics and logic as well as extra ordinary professor of theology.[1]
Steuchius left academic life in 1723, when he was appointed superintendent of the Diocese of Karlstad
In 1730, he was appointed bishop of the Diocese of Linköping however following the subsequent the death of his father, he was appointed to succeed him as Archbishop of Uppsala.[2]
