Washington, D.C. In 1921, Sherrill was appointed chief military aide to President
Warren G. Harding, a role he continued during the early years of
Calvin Coolidge's presidency. While also serving as military aide, Sherrill was appointed director of the Office of Public Buildings and Grounds, beginning in March 1921. In this role, Sherrill was responsible for a large number of projects and departments. He was involved with planning the construction of several prominent sites in Washington, D.C., including the
Lincoln Memorial, the
Ulysses S. Grant Memorial, the
George Gordon Meade Memorial, the
Titanic Memorial, and the
Arlington Memorial Bridge. Blanton wrote that Sherrill presides "arrogantly and pompously as the sole and exclusive dictator, lawmaker, law enforcer, contract letter, concession granter, employee hirer, employee discharger, money disburser, judge, jury and executioner from whose iron decree there is no way of escape." Sherrill also implemented segregation policies in the city's parks, pools, and picnic areas, by requiring installation of signs that said "white" and "colored". An article in
The Durham Morning Herald reported: "Negroes in the District of Columbia have requested President Harding to remove Col. C. O. Sherrill, aide to the president, because the latter is charged with segregating the races at public gatherings in Washington."
Cincinnati Sherrill left Washington, D.C., to work as the first
city manager of
Cincinnati,
Ohio. After Grant III declined to take over the role when Sherrill left,
Clarence Addison Dykstra was named the new city manager. Sherrill worked as vice president of the
Kroger Grocery and Baking Company from 1930 to 1935, assisting with the company's advancements in
supply chain management. His military background and success at Kroger was the inspiration for a character in
Once an Eagle, a novel by
Anton Myrer. Sherrill served as the organization's president, and according to academic author
Michael J. Hicks, was instrumental in thwarting attempts to stop the "anti-chain store movement" by utilizing advertisements and placards. ==Personal life==