I am a member of the algebra group at the Mathematics Department of Temple University. My research is in noncommutative algebra, with particular emphasis on representation theory and invariant theory. My monograph on multiplicative invariant theory appeared in 2005. Subsequently, I worked on applications of Koszul algebras to algebraic combinatorics, algebraic group actions on noncommutative spaces, and representations of Hopf algebras. In 2018, I published a graduate textbook on representation theory.