After graduating, in 1886, Hammond served as principal of schools in
Allen until 1890. He then served a similar position in
North Adams until 1891. During this period, Hammond spent a summer doing work at the Michigan Normal School (now known as
Eastern Michigan University) as well as reading law. Hammond served as deputy for Pattengill's tenure in office, from 1893 to 1897. Hammond wrote the book
The School Law of Michigan, published in 1896. On August 6, 1896, Hammond was nominated by the Republican convention at
Grand Rapids, in a four way race. Hammond won the general election with 293,578 votes, compared to the 232,196 votes of David E. Haskins, the Democratic People's Union Silver candidate. After the general election, Hammond appointed Daniel E. McClure, one of his opponents in the convention, as deputy. Before his election, in 1896, Hammond began an investigation into the conditions of ten counties' schools. He investigated a school in each county, and collected information on various aspects of their conditions, as well photographs. Results were published in the superintendent report of 1897–1898. In the 1898 general election, Hammond defeated Democratic People's Union Silver candidate John F. Evert. In September 1899, Hammond made a new compilation of school laws. Since 1898, Hammond was in favor of a normal school in the Upper Peninsula of Michigan. On September 19, 1899, the Normal School at
Marquette (now known as
Northern Michigan University) was opened. In 1900, Hammond announced that he planned to retire from politics at the expiration of his superintendent term the same year. The same year, Hammond was granted an honorary master's degree from the Michigan State Agricultural College. In 1921, Hammond was appointed by Governor
Alex J. Groesbeck to the state welfare commission. On May 1, 1919, Hammond became the manager of the Michigan Retail Dry Goods Association. Hammond also served as treasurer of the Michigan Merchants' Association and as associate secretary of the Grand Rapids Merchants' Mutual Fire Insurance Company. His retirement was made effective July 1. ==Personal life==