Ceci was admitted to the bar and started his own law practice in Milwaukee. He made his first attempt for election to the
Wisconsin State Assembly in 1956, but lost badly in the
Republican Party primary, earning just 19% of the vote. He was then employed as assistant city attorney in 1958, working for Milwaukee city attorney Walter J. Mattison. Ceci ultimately remained in the city attorney's office until 1963. In 1964, Ceci made another attempt for election to Wisconsin State Assembly. This time he was unopposed in the Republican primary. He went on to win a narrow victory in the general election, receiving 51% of the vote. He represented
Milwaukee County's 18th Assembly district, which then comprised the farthest northern parts of the city and county. During his term in the Assembly, he served on the Assembly Committee on Commerce and Manufacturers, and on the Joint Committee on Repeals, Revisions, and Uniform Laws. Rather than running for re-election in 1966, he launched a campaign for
Attorney General of Wisconsin. He faced a primary against Taylor County district attorney John Olson, but had substantial support from party leadership, boosted by his colleagues in the Assembly, and Olson ultimately dropped out of the race. Ceci went on to defeat in the general election, losing to the incumbent,
Bronson La Follette. Two years later, he began another campaign for Attorney General, but this time could not muster significant support at the Republican State Convention. He quit the race before the primary. ==Judicial career==