[5] Tremulis briefly worked for General Motors before moving to Briggs-Le Baron, a custom coachbuilder for Chrysler at the time.

Returning to Briggs in 1939, he worked with Werner Gubitz and Howard "Dutch" Darrin to design the production versions of the Packard Clipper.

His contributions to these two models helped establish styling trends that would influence automobile designs after World War II.

As Phil Egan described in his book, "Design and Destiny: The Making of the Tucker Automobile", it was Tremulis who was primarily responsible for guiding the fabrication of the "Tin Goose" to conclusion.

The first production Tucker automobiles were powered by a converted Franklin helicopter engine supplied by Air Cooled Motors.

The higher horsepower engine was to be put on the shelf for a future model called the Talisman, of which both Alex Tremulis and his assistant, Phil Egan, would eventually draw up proposals for.