Read this text. In 1842, Czar Nicholas I hired George Washington Whistler—an American builder, draftsman, engineer, and soldier—to build the Moscow–St. Petersburg railway. Is this an appropriate use of an ellipsis? "In 1842, Czar Nicholas I hired George Washington Whistler . . . to build the Moscow–St. Petersburg railway."

Yes, the use of an ellipsis in this sentence is appropriate. The ellipsis is used to indicate the omission of a word or words in the sentence, in this case, it is used to omit the job titles and roles of George Washington Whistler.