Professor Duncan joined the University of Houston Law Center faculty in 1998. She graduated with a B.A. in Political Science from Northwestern University and earned her law degree from the University of Houston Law Center in 1993. Upon graduation from the Law Center, she clerked for the Honorable Edith H. Jones, Judge for the United States Court of Appeals, Fifth Circuit. She was an associate at Vinson & Elkins, L.L.P. prior to returning to clerk permanently for Judge Jones.