Thomas Kilby began his career in the private sector before transitioning into public service. He held various leadership roles in local government, including serving as mayor of Anniston, Alabama. Kilby then moved to the state level, where he gained experience as a state senator and lieutenant governor. His tenure as governor saw significant policy initiatives, including the establishment of the Child Welfare Department and the arbitration of a major labor strike. Throughout his career, Kilby demonstrated a commitment to public service and policy development.

Thomas Kilby's political career reveals a calculated approach to regional economic interests, as seen in his handling of the 1920 Alabama Coal Strike. His governance also highlights an intriguing tension between his efforts to prevent lynching and the tragic outcome of his orders, suggesting a complex stance on civil rights. Additionally, Kilby's establishment of the Child Welfare Department and new labor laws indicates a nuanced engagement with social welfare issues.