After completing his studies in the USA, Lehtinen served as a Commercial
Attaché at the
Consulate-General of Finland in
New York City. The company's original production facilities had been located in and near the town of
Enso, in eastern Finland. Following the ceding of much of Finnish
Karelia to the
Soviet Union at the end of the
Continuation War, these facilities were lost, and the company had to invest heavily to rebuild its production capacity from scratch. During his tenure, the company built its
opulent and controversial headquarters, designed by Lehtinen's friend, architect
Alvar Aalto, completed in 1962 and situated in central Helsinki in a prominent position across the street from the
Presidential Palace. Lehtinen also served in Board roles at various Finnish business and forestry trade associations and other similar organisations. ==Awards and honours==