Together with Sten Stensen, Kay Stenshjemmet, and Jan Egil Storholt, Amund Sjøbrend was one of the legendary four S-es (which sounds like "four aces" in Norwegian), four Norwegian top skaters in the 1970s and early 1980s. His first international success came in 1974, when he won silver at the European Allround Championships. Sjøbrend participated at the 1976 Winter Olympics in Innsbruck, but had no success there. In 1977, he won silver at the European Allround Championships.
Sjøbrend was more or less in the shadow of the other three of the four S-es until he had his best year in 1981. That year, he became both European Allround Champion and World Allround Champion. For his accomplishments, he received the Oscar Mathisen Award that same year.
| Championships | Gold medal | Silver medal | Bronze medal |
|---|---|---|---|
| Winter Olympics | – | – | – |
| World Allround | 1981 | – | – |
| European Allround | 1981 | 1974 | 1977 |
| Norwegian Allround | 1975 | 1974 1981 | 1976 1979 1980 |
| Event | Result | Date | Venue | WR |
|---|---|---|---|---|
| 500 m | 38.62 | 19 March 1977 | Medeo | 37.00 |
| 1,000 m | 1:19.4 | 29 March 1981 | Changchun | 1:13.39 |
| 1,500 m | 1:56.32 | 11 January 1981 | Davos | 1:54.79 |
| 3,000 m | 4:08.22 | 16 January 1981 | Davos | 4:04.06 |
| 5,000 m | 7:08.88 | 24 January 1981 | Deventer | 6:56.9 |
| 10,000 m | 14:58.71 | 15 February 1981 | Oslo | 14:26.71 |
| Big combination | 166.664 | 20 March 1977 | Medeo | 165.884 |
Sjøbrend has an Adelskalender score of 165.216 points. His highest ranking on the Adelskalender was a twelfth place.