From 1894 to 1897, he served as superintendent of industrial arts at
Georgia State Industrial College for Colored Youth (now Savannah State University). He then returned to Claflin College in order to serve as the superintendent of manual training and industrial arts, replacing Robert Charles Bates. He also took classes to receive a B.S. in technology. After completing school, Cooke was employed by the
Freedmen's Aid Society and
Women's Missionary Society of the Methodist Episcopal Church as an architect from 1902 and 1907. In March 1907, he took a three-day federal
civil service examination in
Boston, Massachusetts, as the required workplace admission test at that time was not offered to African-Americans in Washington, D.C. He passed the exams and was hired in the Office of the Supervising Architect of the United States Department of the Treasury. This made him the first African American man to be employed at that department. In 1909, he transferred departments to Field Operations, where he would supervise the construction of federal courthouses and post offices. He continued to work at the Office of the Supervising Architect until 1918, when he changed jobs. He went to work as director of vocational guidance and training at
Wilberforce University, where he remained until 1921. From 1921 to 1929, Cooke had a private architectural practice at 1828 Broadway, Gary, Indiana. He was also the director of Gary Building and Loan Association. Cooke was the first African American to obtain an architect's license in the state of Indiana on October 25, 1929. After the
Wall Street Crash of 1929, he lost his firm and had accrued great debt, to which he was eventually able to repay. In 1931, Cooke re-joined the Office of the Supervising Architect working as a construction engineer; he designed small-town post offices in a few states. In the 1920s and 1930s, Cooke ran an organization that was anti-Ku Klux Klan, as well as anti-“Bow Tie Amalgamation” group (a Black-led group that was KKK-affiliated) in Gary, because these two groups were active locally. He retired from the federal government in 1942. Cooke's profile was included in the biographical dictionary
African American Architects: A Biographical Dictionary, 1865–1945 (2004). == Personal life ==