Mayor-elect Jack Thomas will be sworn into office early Monday evening in a ceremony at City Hall.

Thomas, who defeated Park City Councilman Andy Beerman on Election Day in November, will ascend to the municipal government's highest office from the Planning Commission. An architect, Thomas campaigned on a platform that included a more contemplative approach to growth.

City Councilor-elect Tim Henney will also be sworn into office at the ceremony. City Councilor Cindy Matsumoto will take the oath of office for a second time after her successful re-election campaign.

Each of the three won four-year terms ending in early 2018. Thomas will succeed the retiring three-term mayor, Dana Williams. Henney will replace City Councilman Alex Butwinski, who was unsuccessful in his bid for a second term.

The Monday ceremony in the City Council chambers at the Marsac Building is open to the public. Marci Heil, the city recorder, will administer the oaths of office. Refreshments will be served afterward. The swearing-in is scheduled at 5 p.m. Swearing-in ceremonies are usually brief.

Thomas and Henney are scheduled to attend their first City Council meeting as elected officials on Thursday. Some of the business on the agenda on Thursday is expected to include the planned expansion of the Park City Library and Education Center and waterworks contracts.