As was the custom in the 18th and early 19th century,  Sheffield began his career in 1850 training as an apprentice dentist with  J. A. G. Comstock of New London, Connecticut.
He furthered his dentistry education in New York City by working under  Charles Allen and D. H. Porter.

In April 1852, Sheffield moved to New London, Connecticut  and began a long and successful practice in dentistry and dental surgery.
Dr. Sheffield became one of the most successful dentists and dental surgeons in the United States.

Sheffield graduated, in 1865, from the Ohio College of Dental Surgery, the second oldest dental school in the United States,  as a Doctor of Dental Surgery, see Figure 2.
In 1866, Dr. Sheffield received a naval commission from the President of the United States, Andrew Johnson, as a dental surgeon.
As was the custom in the 18th and early 19th century,  Sheffield began his career in 1850 training as an apprentice dentist with  J. A. G. Comstock of New London, Connecticut. He furthered his dentistry education in New York City by working under  Charles Allen and D. H. Porter.
In April 1852, Sheffield moved to New London, Connecticut  and began a long and successful practice in dentistry and dental surgery. Dr. Sheffield became one of the most successful dentists and dental surgeons in the United States.
Sheffield graduated, in 1865, from the Ohio College of Dental Surgery, the second oldest dental school in the United States,  as a Doctor of Dental Surgery, see Figure 2. In 1866, Dr. Sheffield received a naval commission from the President of the United States, Andrew Johnson, as a dental surgeon.
Washington Sheffield