After the German occupation of Norway in 1940, he was a member of the new governing body of the Norwegian Students' Society, which included students from all political groups, except the National Socialists.
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Rognlien was a member of Bærum municipality council from 1955 to 1960 and 1967 to 1979, and also of Akershus county council from 1963 to 1975.
Helge Karlsen | Helge Holden | Helge Schneider | Helge Sander | Helge Nielsen | Helge Ingstad | Paal-Helge Haugen | Helge Skoog | Helge Sivertsen | Helge Seetzen | Helge Rosvaenge | Helge Ness | Helge Jordal | Helge Haugen |