He had taught in practically all universities in Cebu and was Dean of the College of Law, University of Cebu, in 2002-2007 (with its 1st batch of Bar examinees registering 80% passing and its salutatorian hurdling 8th place and with its 2nd batch’s valedictorian landing 10th place).
He was Asst. City Fiscal of Cebu City in 1963 (at age 27, the youngest in the country at that time), Actg. City Fiscal of Toledo City, Commissioner of the Cebu Port Authority, and Director of the Metropolitan Cebu Water District.
He was elected member, Sangguniang Bayan of Cordova, Cebu in 1975 and member, Sangguniang Panlalawigan of Cebu in 1975-84; elected as one of the six Assemblymen of Cebu Province in 1984; elected Mayor of his town for 3 terms (2007-2016) and Vice-Mayor in the 2016 elections but resigned therefrom to assume the position of Presidential Adviser on Legislative Affairs and Head, PLLO on September 1, 2016.
Secretary Sitoy was editor-in-chief of high school and college publications; authored the History of the Municipality of Cordova and biography of spouses Mario and Lita Ortiz (MAR-LITA, Story of Faith, Love and Dignity); co-authored the History of the City of Cebu and an English-Cebuano Visayan Dictionary (with 66,000 English words translated into Cebuano-Visayan).
In his high school days, he contributed articles to the Philippine Free Press and won several essay writing contests and a biographical writing contest sponsored by the Philippine Chamber of Commerce.
He was Grand Knight, Knights of Columbus, Cordova Council No. 924 (1999-2000; 2000-2001) and Faithful Navigator, Mons. Santos dela Serna Assembly No. 2837, Mactan Island, Lapu-lapu City and Cordova, Cebu (2003-2005)