He began his art studies from 1867 to 1871 with the sculptor, Julius Middelthun, at the Royal Drawing School.
[3] From 1874 to 1875, he was a tutor for Erik Werenskiold, who was only two years his junior His most notable project was the bronze sculpture of Peter Tordenskjold, Vice-Admiral in the Royal Danish-Norwegian Navy.
The competition for creating the statue was originally won by another sculptor, Anders Svor, but the actual work was assigned to Ender.
For his finished work, Ender was made a Knight in the Royal Norwegian Order of Saint Olav.
The altarpiece which he designed for the former Molde Cathedral in Møre og Romsdal, was retained and stands today at the north wall of the new basilica which was constructed in 1957.