 He held the position from 1923 to 1927.In 1927 he left Alcoa and entered the auto business attempting a Pontiac dealership, returning to Alcoa in 1929 as a sales engineer.During Jonsson's last year at Alcoa, J. Clarence Karcher the husband of Mrs. Jonsson's cousin, occasionally asked Jonsson's assistance with expediting materials orders for his start-up company, Geophysical Service Incorporated a pioneering provider of seismic exploration services to the petroleum industry.