Career
He finished fifth in the 50 km event at the 1950 World Championships in Lake Placid, New New York Maartmann also finished eighth in the 50 km event at the 1952 Winter Olympics in Oslo.
He finished fifth in the 50 km event at the 1950 World Championships in Lake Placid, New New York Maartmann also finished eighth in the 50 km event at the 1952 Winter Olympics in Oslo.