Parks' career started as a Chevrolet salesman at the Gravois Motor corporation in St. Louis. Combining his sales and piloting skills, Parks flew a Standard J with the Gravois Motor logo painted on the fuselage and wings. A friend of Charles Lindbergh, Parks founded the Parks Air College at Lambert Field, St Louis, in 1927 and quickly established higher standards for the amount and quality of training that student pilots were required to complete to earn their commercial pilot’s certification. In the late 1930s, with war brewing again in Europe and no air force in existence, Parks also convinced the Air Corps that the training program at his college could adequately prepare military pilots for combat missions. In October 1938, General Hap Arnold brought in the top three aviation school representatives to request they establish an unfunded startup of Civilian Pilot Training Program schools at their own risk. These were Oliver Parks of Parks Air College, C. C. Moseley of the Curtiss-Wright Technical Institute, and Theopholis Lee of the Boeing School of Aeronautics; all agreed. In 1939, Oliver Parks was brought to Alabama to set up a Civilian Pilot Training Program for the University of Alabama at Van de Graaff Field. In 1940, he leased all of Curtiss-Steinberg Airport, which was renamed Curtiss-Parks Airport, for his school. By the end of World War II, more than 37,000 cadets had received their primary flight instruction at a Parks institution. In 1944, Parks conducted a nationwide survey to see what features the potential pool of 70,000 new post-war pilots would want in a personal aircraft. In 1946, having concluded that future aviation leaders would need a broader, more academic education and also out of gratitude for the aid given him by Jesuit priests after a 1927 crash, Parks gave the college named after him to Saint Louis University, a Jesuit institution located across the Mississippi River from Parks’ Cahokia, Illinois campus, where it was renamed the Parks College of Engineering, Aviation and Technology of Saint Louis University. After the war, Parks bought the airport outright and renamed it Parks Metropolitan Airport. He also started two companies, Parks Aircraft Sales and Service for small private airplanes, and Parks Airline, the latter in 1950. Ozark Air Lines later bought Parks' feeder airline. In 1959, with the airport experiencing financial difficulties and seeing more potential in real estate, Parks closed the facility and began developing a residential community on the property. However, only about 200 of the 2500 homes in the "St Louis Gardens" subdivision were built. The need for a secondary airport to take pressure off the overcrowded Lambert Field resulted in the property being purchased by the Bi-State Development Agency in 1965 and converted back into an airport. Parks stayed on as Airport Manager for two years at annual salary of $1.
