Education
Hasse joined the Swedish Army as a volunteer and attended military school as a furir (private first class).
biathlete alpine skier athletics competitor
Hasse joined the Swedish Army as a volunteer and attended military school as a furir (private first class).
He later retired from the army as a kapten. Together with Claes Egnell, Willie Grut and Gustaf Lindh he competed in the 1948 Winter Olympics in the winter pentathlon, which was contested as a demonstration event. Fellow countrymen Lindh and Grut took the first and second place respectively.
Since the winter pentathlon would have no other appearances at the Olympic Games, Haase turned to the modern pentathlon.
He was selected for the 1956 Summer Olympics and finished 17th individually. In the first event, horse riding, Thofelt had drawn the lot for a very peculiar horse and eventually suffered from a concussion, after he fell off twice and had to withdraw.
Consequently the Swedish team was not ranked. Hasse was also successful at the world championships.
Haase"s home club was Studenternas Idrottsförening Stockholm.
He completed an engineering study at the Royal Institute of Technology in Stockholm with a focus on metallurgical and then worked in the metallurgical industry in Fagersta, where he resided until his death in July 2014.