James Tierney Jr. served in the US Air Force, where he gained extensive experience in aviation and strategic planning. Post-military, he transitioned into the private sector, selling cars. His professional background includes a leadership role in operations planning. Tierney Jr. currently serves as a Republican member for the Coos 1st district of the New Hampshire House of Representatives. He has been married for over five decades and has a large family.

James Tierney Jr.'s political philosophy blends traditional conservative principles with an unexpected openness to market-based environmental solutions. His support for lower taxes and reduced federal intervention in healthcare and education aligns with standard Republican ideology, yet he diverges by favoring market-driven approaches to climate policy. Tierney Jr.'s steadfast advocacy for increased military spending contrasts with his market-oriented environmental stance, revealing a complex approach to national security and economic policy. His consistent policy positions over the years suggest a deeply rooted, ideologically agile strategy.