During the 1970s, Muriel Morisey played an integral role in two congressional offices. In 1971, she began her career in Washington, DC, as a constituent caseworker and press secretary for Walter Fauntroy, the first African-American Delegate from the District of Columbia. By 1975, she was the senior legislative assistant for Representative Shirley Chisholm of New York, the first African-American Congresswoman.