Thomas Kirker began his life in County Tyrone, Kingdom of Ireland, before relocating to the United States. He established a career in public service, marked by his participation in the Ohio Constitutional Convention and his tenure in both the Ohio House of Representatives and the Ohio State Senate. Kirker's leadership was highlighted by his role as Speaker of the Senate and his brief term as Governor of Ohio. He demonstrated a commitment to local economic policies and governance principles, serving as an Ohio Presidential elector and an elder in his Presbyterian congregation.

Thomas Kirker's political philosophy centers on a localized approach to economic policy, advocating for the growth of Ohio's regional industries. His tenure in various state offices reveals a strategic emphasis on residency requirements for political legitimacy, as seen in his insistence on disqualification of Return J. Meigs Jr. Kirker's religious convictions as a Presbyterian elder also subtly influenced his governance, yet he managed to align with opposing factions on environmental regulations, suggesting a calculated balancing act to protect industrial interests.