The 2025 Senate Resolution 1, introduced on January 6, 2025, by Senators LeMahieu, Feyen, and Felzkowski, officially organizes the Wisconsin Senate for the 2025-2026 session. The resolution outlines the election of presiding officers, legislative officers, and political party officers as per the Wisconsin Constitution. Senator Mary J. Felzkowski is designated as the President, with Senator Patrick Testin serving as President pro tempore. The legislative officer role of Sergeant at Arms is filled by Honorable Tom Engels.

Additionally, the resolution lists the majority and minority party officers, with Senator Devin LeMahieu as the Majority Leader and Senator Dianne Hesselbein as the Minority Leader, among others. Following the adoption of this resolution, the chief clerk is tasked with notifying both the assembly and the governor that the Senate is organized and ready to conduct its business for the upcoming session.