Charles A. Sink was born July 4, 1879, in Westernville, NY in Oneida County, and attended high school in Churchville, NY He received a bachelor of arts degree from the University of Michigan in 1904. That same year, he began his long association with the University Musical Society, serving first as secretary (1904-07), executive manager (1907-27), and then president (1927-68). In addition, Sink was secretary and business manager of the University of Michigan School of Music (1904-27), then its president (1927-40).
Sink was also politically active. He served in both the state house and senate. He was a Republican member of the Michigan House of Representatives (1919-20 and 1925-26) and the Michigan Senate (1921-22, 1927-28, 1929-1930). In the legislature, Sink was chairman of the committees on education in both the Senate and House. Here he sponsored legislation affecting the state educational system and institutions. Sink was also a candidate in the 1932 primary for the office of lieutenant governor. Prior to this he was a member of the Republican State Central Committee (1928-32).
Throughout his life, Sink was involved in a variety of community and philanthropic activities. He died December 17, 1972.