- He served as General Procurator of Saint Lucia, Saint Vincent and the Grenadines and Grenada.
1969 - He gave up the public service and became a lawyer. When the Saint Lucia Labour Party gained power in 1979, Cenac became attorney general in the government of Allan Louisy.
1981 - When Louisy resigned on the 4th of May, Cenac became prime minister.
1982 - He served for 8 months until he too was forced to resign due to political conflicts on the 17th of January.