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 topics related to transformation groups and invariant theory. For about ten years, I focused on multiplicative invariant theory. My monograph with that title appeared in 2005. Subsequently, I have worked on applications of Koszul algebras to algebraic combinatorics, algebraic group actions on noncommutative spaces, and representations of finite Hopf algebras. Currently, I am in the process of writing a graduate textbook on representation theory.