Cleo Fields attended the schools of his home and studied until 1984 at Southern University. After a subsequent law degree from the same university he began to practice as a lawyer. Fields founded the movement Young Adults for Positive Action. Politically, he was a member of the Democratic Party. Between 1986 and 1992 he sat in the Senate from Louisiana. In 1990 he ran unsuccessfully for Congress. In the congressional elections of 1992, Fields was the fourth electoral district of Louisiana in the U.S. House of Representatives in Washington DC chosen, where he succeeds Jim McCrery took on 3 January 1993, which moved into the fifth district. After a re-election he was able to complete in Congress until January 3, 1997, two legislative sessions. In 1996, he opted not to run again.
In 1995 he applied unsuccessfully for the office of governor of Louisiana: With 36.5 percent of the vote he lost the Republican candidate Mike Foster significantly. In 1997 he was briefly under suspicion of bribery because he allegedly accepted cash of the now convicted of corruption Governor Edwin Edwards. The matter was not pursued further because Fields at this time held no public office and the financial transaction was explained by Edwards a private matter. He then founded his own law firm. To date, he has worked as a lawyer.