[1] Flewelling started his career as a draftsman for Henry M. Patterson, a Los Angeles-based architect, from 1921 to 1923.
[1][3] Later, he designed the city hall and police station in Newport Beach, California in 1949.
[1][6] Two years later, in 1949, they designed Paradise Canyon Elementary School located at 471 Knight Way in La Canada, California.
[1][7] They designed Morningside High School located at 10500 Yukon Avenue in Inglewood, California in 1953.
[1][9] That year, they also designed the Del Norte School in West Covina, California.