<sod>Ericson was born in [[Stockholm]], Sweden, the son of rear admiral Hans Ericson and his wife Elin (née Gadelius). He passed ''[[studentexamen]]'' in 1915<ref name="Harnesk (1962), pp. 359-360">{{cite book |editor1-last=Harnesk |editor1-first=Paul |date=1962 |title=Vem är vem? 1, Stor-Stockholm |trans-title=Who is who? 1, Greater Stockholm |edition=2nd |location=Stockholm |publisher=Vem är vem |language=Swedish |url=http://runeberg.org/vemarvem/sthlm62/0383.html |pages=359-360}}</ref> and became an naval officer and acting sub-lieutenant in the [[Swedish Navy]] in 1918. Ericson served at the [[Naval Staff (Sweden)|Naval Staff]] from 1926 to 1932.<ref name="Burling (1962), p. 290">{{cite book |editor1-last=Burling |editor1-first=Ingeborg |date=1962 |title=Vem är det: svensk biografisk handbok. 1963 |trans-title=Who is it: Swedish biographical handbook. 1963 |location=Stockholm |publisher=Norstedt |language=Swedish |url=http://runeberg.org/vemardet/1963/0306.html |page=290}}</ref> Ericson was a teacher at the [[Royal Swedish Naval Staff College]] from 1928 to 1938 and served as a naval assistant at the Board of Telecommunications Services (''Telegrafstyrelsen'') from 1929 to 1932.<ref name="Burling (1962), p. 290"/><eod>
<sod>Ericson was born in [[Stockholm]], Sweden, the son of rear admiral Hans Ericson and his wife Elin (née Gadelius). He passed ''[[studentexamen]]'' in 1915<ref name="Harnesk (1962), pp. 359-360">{{cite book |editor1-last=Harnesk |editor1-first=Paul |date=1962 |title=Vem är vem? 1, Stor-Stockholm |trans-title=Who is who? 1, Greater Stockholm |edition=2nd |location=Stockholm |publisher=Vem är vem |language=Swedish |url=http://runeberg.org/vemarvem/sthlm62/0383.html |pages=359–360}}</ref> and became an naval officer and acting sub-lieutenant in the [[Swedish Navy]] in 1918. Ericson served at the [[Naval Staff (Sweden)|Naval Staff]] from 1926 to 1932.<ref name="Burling (1962), p. 290">{{cite book |editor1-last=Burling |editor1-first=Ingeborg |date=1962 |title=Vem är det: svensk biografisk handbok. 1963 |trans-title=Who is it: Swedish biographical handbook. 1963 |location=Stockholm |publisher=Norstedt |language=Swedish |url=http://runeberg.org/vemardet/1963/0306.html |page=290}}</ref> Ericson was a teacher at the [[Royal Swedish Naval Staff College]] from 1928 to 1938 and served as a naval assistant at the Board of Telecommunications Services (''Telegrafstyrelsen'') from 1929 to 1932.<ref name="Burling (1962), p. 290"/><eod>