 To do his thesis entitled "General Haushofer and his Ideas on Geopolitics," Thomson spent time in Germany, becoming fluent in the German language.Returning to Canada, Thomson worked for a short time at the National Film Board of Canada before being invited to served as Associate Private Secretary to Canadian Prime Minister, Louis St. Laurent where he remained until 1958.Involved with both the Liberal Party of Quebec and the Liberal Party of Canada, in the 1958 Canadian federal election Thomson was the unsuccessful Liberal candidate in the Jasper—Edson riding.