She then obtained her private pilot's license in 1931, and purchased a Waco silver airplane, which she used for short business trips and when visiting her parents at their summer home, Chiselhurst, which was located near Jaffrey, New Hampshire.

[11] During Pennsylvania's severe flooding in 1936, Yeatman reportedly flew her airplane to affected areas, where she dropped food and medicine to survivors.

After informing Beaufort's officials about the situation, she successfully flew her plane for two hours to Pennsylvania, where she requested that the airfield be cleared for an emergency landing.

[17] A member of Philadelphia's zoning board, she also served on the commission that had been appointed by the city's mayor to oversee the transformation of the Hog Island municipal airport into an air-rail-marine terminal.

[18][19] In April 1936, Yeatman urged her fellow members of the zoning board to reclassify a portion of Clinton Street from commercial to "Class D-1 Residential" to preserve the neighborhood's historic character.

[22] According to the St. Louis Post-Dispatch, Yeatman's project list, as of January 1936, included plans for the:[23][24] She also designed plans for a residential housing development that was built near Paoli, Pennsylvania, an addition to the Oakburne School, individual homes and residential developments in New Hampshire and Virginia, and an addition to her alma mater, the Shipley School.