Humetewa, a professor at Arizona State University, has worked in private practice and as an assistant U.S. attorney, according to her official bio. She's a member the Hopi Indian Tribe.
Fellow Arizonan, Sen. John McCain (R), congratulated her on Twitter.
Congrats to #Arizona's Diane Humetewa - confirmed today as the first Native American woman to ever serve on the federal bench!
— John McCain (@SenJohnMcCain) May 14, 2014