Before her election to the state legislature, Cyndy taught community college mathematics and served on the Puyallup City Council.

[6] The following year, Jacobsen proposed several more bills, two of which were signed into law on March 11, 2022, after also passing unanimously in the House and the Senate.

[9] During the 2025 legislative session, Jacobsen introduced HB 1038, which would ban gender affirming care for minors in Washington State.

Although initially hesitant about the price tag and perceived "fancy" design, Jacobsen said on January 14, 2020, that she had been convinced of the value and she was "ready to pull the trigger on this.

[12] At a council meeting on November 23, 2021, Jacobsen voted against bringing the building back to the ballot in February 2022.

Jacobsen said, "My personal problems with the plan we were given, graciously, by the people proposing it … was that the commission would have a scope of authority that we would not entitled to give them.

"[13] When asked about the racist statue during a Public Candidate Forum with the League of Women Voters, she said "I don't believe in limits on free speech.