O’Fallon City Administrator Bonnie Therrien announced her resignation, effective Feb. 28, in a letter to Mayor Bill Hennessy and the O’Fallon City Council.
Therrien had served as city administrator since July 2013. Assistant City Administrator Lenore Toser-Aldaz was named interim city administrator, effective immediately.
“I am grateful to Bonnie for her service to O’Fallon, our residents and our businesses,” Mayor Hennessy said. “Bonnie is a true professional and she has helped our city move in a very positive direction over these past four years. She was a strong supporter of our city staff and I appreciate all she’s done for our employees during her time with O’Fallon.”
In her resignation letter, Therrien thanked the city employees.
“Every department gives their all to the residents in fulfilling the mission of O’Fallon,” she wrote. “I was proud and humbled to work beside each and every employee through the years.”
Councilmember Rose Mack [Ward 2] had nothing but good things to say about Therrien. “She did a very good job; she was always prompt and I never had any problems with her.”
Mack said that the city manager position is a demanding one with many bosses. Councilmember Mike Pheney [Ward 5] agreed.
“The position of city administrator is a complex and ever-changing one. Turnover for the position as a profession is generally high, especially for a large and growing city like O’Fallon. I can share with you that I believe the replacement process has enabled us to survey best practices in city management and bring in fresh thinking and objective oversight that has served our community well in the long run.”
Other councilmembers declined to comment on Therrien’s departure, citing privacy rules regarding personnel matters.
Therrien will continue to serve in an advisory role through August 2018 in order to assist with the transition to a new administrator and support ongoing projects.
“Much of that remains to be seen, especially while our elections and selection of a new administrator are sorted out,” Pheney said. “But I am confident Bonnie’s many talents may prove helpful in a variety of circumstances in the coming months.”
Recruitment for the city administrator position will begin later this spring.