 She was in private practice of law in Wilmington, Delaware from 1965 to 1985, with the law firm of Richards, Layton & Finger.Roth was nominated by President Ronald Reagan on October 16, 1985, to a seat on the United States District Court for the District of Delaware vacated by Judge Walter King Stapleton.She was confirmed by the United States Senate on November 1, 1985, and received commission on November 4, 1985.