Jim Ritts will be sworn in as the next Ontario County district attorney during a private ceremony Dec. 30.
Ritts, a Republican who has been serving as first assistant district attorney, is replacing his boss, Michael Tantillo, who has been with the district attorney’s office for more than 38 years, leading it for the last 28 and a half.
Tantillo decided earlier this year to not seek re-election and retire at the end of the year.
Administering the oath of office to Ritts will be Judge Craig Doran, administrative judge of the eight-county Seventh Judicial District, who is also a Canandaigua resident.
Ritts is expecting about 140 people to attend his swearing-in and post-ceremony reception. He said his family alone includes about 40 people.
He said he will soon name his replacement as first assistant.
Ritts, who has been with the district attorney’s office for 18 years, has conducted more than 100 jury trials and argued more than 160 appeals.