[2] Seamans began work as a clerk at E. Remington and Sons, the firm at which his father was a purchasing agent, at the age of fifteen.
[Note 1] In 1875, he began a three-year stint of overseeing a silver mine in Bingham Canyon, Utah.
Upon returning to the state of New York, Seamans became a bookkeeper and salesman at Fairbanks & Company, a scale manufacturer.
Fairbanks had become the sole marketer of the Sholes and Glidden typewriter, produced by Seaman's former employer, E. Remington and Sons.
After 1879, Seamans lived in Brooklyn with his wife Ida Gertrude Watson and their two daughters, Mabel and Dorothy.