First Selectman Jayme Stevenson has announced the appointment of Kate Buch as new town administrator following the recent departure of longtime administrator Karl Kilduff.

For the past 15 years, Buch has served as New Canaan’s finance director and is credited with helping maintain the town’s AAA Credit Rating and manage pension plans for town workers and police.

Buch, a Greenwich native who lives in Port Chester, N.Y., said she expected turnover of municipal positions in November’s election will keep her busy. As town administrator, she will have responsibility for shepherding the town’s draft budget through the approval process.

“I will need to bring them up to speed on the issues of the budget and other things before the town right now,” Buch said of new officials. “I think in some ways the job is an extension of the job I’ve been doing as finance director with some new territory.”

“Kate has demonstrated her superior skills in finance by her award-winning financial statements, her thorough understanding of Darien’s operating and capital accounts, and her excellent preparation of our board members for the Board of Finance’s monthly meetings,” Elizabeth Mao, chairwoman of the town’s Board of Finance, said in a statement. “We wish her continued success in her new role as town administrator.”

Buch served as interim town administrator in 2007 before Kilduff’s arrival, and previously worked as the town’s finance officer from 1994 to 1996. In that role, she helped manage the town’s accounting system, capital finance program and annual budget.

She also served as a financial advisor for Morgan Stanley Dean witter from 1999 to 2000, director of finance for the city of West Haven from 1996 to 1999, and controller/treasurer for the town of Southbury from 1986 to 1994.