1 8 9 9 , ▁at ▁the ▁age ▁of ▁ 1 4 , ▁and ▁worked ▁in ▁that ▁field ▁until ▁ 1 9 1 4 , ▁when ▁he ▁started ▁his ▁own ▁fish ing ▁business . ▁He ▁was ▁involved ▁in ▁the ▁local ▁branch ▁of ▁the ▁International ▁Organisation ▁of ▁Good ▁Tem pl ars , ▁from ▁ 1 9 1 7 ▁to ▁ 1 9 1 8 ▁he ▁was ▁a ▁board ▁member ▁of ▁N org es ▁ko oper ative ▁lands for ening , ▁and ▁from ▁ 1 9 1 3 ▁to ▁ 1 9 4 0 ▁and ▁ 1 9 4 5 ▁to ▁ 1 9 4 7 ▁he ▁was ▁the ▁board ▁chairman ▁of ▁the ▁local ▁newspaper ▁T id ens ▁K rav . ▁He ▁was ▁a ▁member ▁of ▁Krist ians und ▁city ▁council ▁from ▁ 1 9 1 3 ▁to ▁ 1 9 5 1 , ▁serving ▁as ▁mayor ▁from ▁ 1 9 3 4 ▁to ▁ 1 9 4 0 ▁and ▁ 1 9 4 5 ▁to ▁ 1 9 4 7 . ▁He ▁also ▁cha ired ▁the ▁city ▁school ▁board ▁from ▁ 1 9 2 8 ▁to ▁ 1 9 3 3 . ▁ ▁O ls en ▁was ▁elected ▁to ▁the ▁Parliament ▁of ▁Norway ▁in ▁ 1 9 3 3 , ▁representing ▁the ▁constitu ency ▁Market ▁towns ▁of ▁M ø re ▁og ▁R oms dal ▁county . ▁He ▁was ▁re - elect ed ▁five ▁times , ▁ending ▁his ▁last ▁term ▁in ▁ 1 9 6 1 . ▁From ▁ 1 9 4 8 ▁to ▁