After college, Hughes taught science at
Salem Academy in
Winston-Salem, North Carolina, for two years. After her move to Washington, D.C. and enrollment in night classes at The George Washington University Law School, she worked as a
police officer during the day. As a police officer, Hughes did not carry a gun or wear a police uniform because she worked to prevent crimes among women and girls, patrolling areas where female runaways and prostitutes were normally found. Her job was an expression of the progressive idea of rehabilitation instead of punishment. Hughes later credited this job with instilling in her a sense of commitment and responsibility to women and children. At that time she lived in a tent home near the
Potomac River and commuted to the campus by canoe each evening. Eventually, Priest, Herndon, and Ledbetter, a small law firm, gave her a rent-free space and even referred some cases to her in exchange for her services as a receptionist. As her practice grew, she became increasingly active in local women's organizations. She joined the
Zonta Club, the Business and Professional Women's Club, the Dallas Women's Political League, the
League of Women Voters,
YWCA, Dallas College Club, and the
American Association of University Women. Hughes served as Chair of the AAUW Committee on the Economic and Legal Status of Women, advocating equal pay jury service for women, and improved status and recognition for women in the Armed Services. She practiced law for eight years in Dallas before becoming involved in
politics, first being elected in 1930 to three terms in the
Texas House of Representatives as a
Democrat. In 1935, Hughes accepted an appointment as a state judge from Governor
James Burr V. Allred for the Fourteenth District Court in Dallas, becoming the state's first female district judge. In 1936, she was elected to the same post. She was re-elected six more times and remained in that post until 1961. ==Federal judicial service==