Later, he was the senior vice president of management information systems at Lange Financial and again at Pacific Mutual Life Insurance.

[5] In 2014, Linthicum ran as a conservative insurgent for the 2nd U.S. Congressional District seat held by U.S. Rep. Greg Walden, R-Hood River.

The walkout's aim was to prevent a vote on a cap-and-trade bill that supporters said would lower greenhouse gas emissions by 2050 to combat climate change.

Republicans returned on June 29 for a weekend marathon of votes, narrowly avoiding the constitutional deadline to complete the 160-day session.

While participating in a Republican-led walkout in May 2023, Linthicum reached the 10 unexcused absence threshold set by measure 113, disqualifying him from running for reelection after his current term ends.

[16] Linthicum and four other Senators filed a lawsuit against Oregon Secretary of State LaVonne Griffin-Valade in response, arguing that the measure's wording allowed them to serve one additional term before being barred from reelection.

[18] The Oregon Supreme Court agreed to hear the case with arguments beginning December 14[19] and unanimously ruled against the Republican Senators, confirming Linthicum's disqualification after the end of his term in January 2025.