Smith worked as a salesman of business materials and for the business department of
The Philadelphia Record. In 1897, he began working for the National Surety Co. of New York. He later served as vice president of the company. He then formed the Thomas B. Smith Company, which bonded post office, municipal and county employees. During his tenure, many planned projects were delayed due to
World War I. During the 1917 primary election, Smith, who was allied with
William Scott Vare's political machine, supported Issac Deutsch in for the Republican nomination. Jim McNichol, who was part of the
Boies Penrose machine, supported James Carey. Deutsch's supporters brought a gang from New York who attacked Carey. During the melee, a police officer, George Eppley, was shot and killed. Much of the blame fell on Smith, who, as mayor, controlled the police, worked to ensure that the officers assigned to the district would support Vare's candidate and harass supporters of Carey. The District Attorney,
Samuel Rotan, who was a Penrose ally, indicted Mayor Smith for 'conspiracy to commit murder' as well as impeding a free and fair election. While he was acquitted of the charges, the cloud of suspicion hung over the mayor for the remainder of his term. ==Personal life==