Susanne Cecelia Brenner is an American mathematician, whose research concerns the finite element method and related techniques for the numerical solution of differential equations. She held the Michael F. and Roberta Nesbit McDonald Professorship at Louisiana State University, where she is now the Nicholson Professor of Mathematics, and she chairs the editorial committee of the journal Mathematics of Computation.
Brenner did her undergraduate studies in mathematics at Stony Brook University, graduating in 1982. She obtained her Ph.D. from the University of Michigan in 1988 under the joint supervision of Jeffrey Rauch and L. Ridgway Scott; her thesis was entitled "Multigrid Methods for Nonconforming Finite Elements". She held faculty positions at Clarkson University and the University of South Carolina before moving to LSU in 2006. With L. R. Scott, she is the author of The Mathematical Theory of Finite Element Methods (Springer-Verlag, 1994; 3rd edition, 2008).
She is a fellow of the Society for Industrial and Applied Mathematics, the American Mathematical Society, and the American Association for the Advancement of Science.