On 3 March 1877, the last full day of Grant's presidency, he commissioned Sniffen as a
major and appointed him to the
United States Army's Pay Department. While assigned to the War Department, Sniffen actually continued serving at the White House to aid the transition from Grant to the incoming administration of President
Rutherford B. Hayes. After his initial duty in Washington, D.C, in November 1877 Sniffen was posted to the
Military Division of the Pacific, then assigned to the division's
Department of California headquarters in
San Francisco. After reporting to San Francisco, Sniffen was assigned to duty in Arizona, where he remained for the next two years. His duties in Arizona included travel between military posts to pay soldiers during
Victorio's War, and in May 1880, Sniffen and his escort narrowly missed being ambushed by members of Victorio's band. In June 1881, Sniffen was transferred to paymaster duties with the
Department of the Platte, which was headquartered in
Omaha. After serving at the department's
Fort D. A. Russell, Wyoming, in May 1885, he was reassigned to paymaster duties with the
Department of the East and stationed in New York City. In February 1890, he was assigned to act as the army's paymaster-general, pending selection of a replacement for William B. Rochester. In March, President
Benjamin Harrison appointed
William Smith, and Sniffen returned to duty in New York City. In November 1891, Sniffen was performing paymaster duties at
Fort Clark, Texas when a portion of the cash for which he was responsible was stolen; according to news accounts, the money was locked in a cell of the post guardhouse, after which someone removed one of the sacks of money without being observed. Two soldiers who had recently been discharged were suspected, and were later arrested soon after the theft. Only about $340 of the stolen $3,300 ($117,000 in 2025) was recovered, and in June 1892 the
United States Court of Claims absolved Sniffen of responsibility for the loss. The
United States Department of the Treasury was ordered to credit his accounts with $2,958 and balance his account with the government. ==Later career==