By 1914, Robineau was practicing law in Boston. In 1918, Robineau was a partner in the Rose & Robineau law firm in Miami. Upon returning from military service, Robineau earned appointment as Miami City Attorney. Robineau was an early board member in the
Zonite Products Corporation. S.P won election to the
Florida House of Representatives, representing Miami from 1929 through 1936. Robineau introduced the bill in the Florida Legislature which made Stephen Foster's song,
Old Folks at Home, also known as Suwanne River, the State Song in 1935. He later helped write the state pari-mutuel laws. In 1936, he served as a witness in the Senate impeachment of Judge
Halstead Ritter. He had a number of real estate investments and helped develop the city of
El Portal, FL. ==Military career==