Representative Town Meeting member Laurene J. O’Brien, who ran — and won — office as a Democrat in District 5 in 2013, has switched political parties.

An announcement of the change was made at Monday’s Republican Town Committee meeting by RTM Deputy Majority Leader Michael Herley.

O’Brien said that on key issues before the RTM she often found herself aligned with the GOP. “After many conversations and considerable thought, I resigned from the Democratic Town Committee to join the Republican Party,” O’Brien said. “It was not a decision I made lightly, and I’m certain it is the right thing to do.”

She said she hopes her work and reputation stand on their own merits and that her goal is to continue helping the her district and the town. O’Brien plans to run for re-election this year, but on the Republican slate this time.

“Going forward, I plan to continue with professionalism and grace to represent my constituents, by working to keep the focus on what's best for Fairfield,” O’Brien said. “From the beginning I was fully transparent, when I promised to ‘work to address education, sustainability of town services and increasing taxes in Fairfield.’ I have remained consistent and plan to continue that same work, now as a Republican.”

O’Brien said she’s eager to move forward with the GOP and is “delighted at the inviting, positive and warm welcome I’ve received.”

Because of the rules regarding party registration, Herley said O’Brien will not be able to caucus with Republicans on the RTM until October.