Career
In 1917 Roos was a distributor of Harley Davidson pedal cycles in Omaha, Nebraska becoming one of the largest distributors in the Midwest. The company dissolved in 1924. Roos became the second largest shareholder in the start-up venture that went on to produce the most popular general aviation aircraft in the world.
Roos resigned just one month into the partnership, selling back his interest to Cessna, and the company changed its name to Cessna Aircraft in December 1927.
In November 1927, the owner of the Swallow Airplane Company, Moellendick, became insolvent after sidelining Swallow production to make the Dallas Spirit on cr to enter the Dole Air Derby Roos took control of the company, becoming the general manager, then left in 1928. In 1928 Roos joined, the American Eagle aircraft company, which produced more Bellanca designed aircraft. where he became president
When the company dissolved during the depression, Roos founded the short lived Roos Aircraft Company to continue to sell the American Eaglet design. With Roos"s permission, Ben Howard built his famous air racer, Mr.
Mulligan at the factory site after production of the Eaglet had ceased.
After World World War II Roos founded the Automatic Coin Machine Company in Kansas City to distribute Juke Box Machines.