[1][2] Tjaarda trained in aeronautical design in the United Kingdom and later served as a pilot in the Dutch Air Force.
After emigrating to the United States in 1923, he changed his name to John and worked in custom coachbuilding in Hollywood.
The best-known of their factory customs was a two-door phaeton called the Touralette, designed earlier by Tjaarda for himself, which Chrysler offered on their L-80 Imperial chassis in 1927–1928.
[3][4] Tjaarda also worked for a while with the original GM Art and Colour Section under famous designer Harley Earl.
There he developed a concept car for the Ford Motor Company to be shown at the Century of Progress Exhibition (1933-1934) in Chicago.