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Joseph HirschJoseph Hirsh graduated from the CUNY Graduate Center in 2013. He earned his PhD under the direction of John Terilla. Joseph has been the recipient of an NSF Graduate Student Fellowship, an NSF Postdoctoral Research Fellowship, a Gilleece Fellowship, and has been a visiting researcher at the Max-Planck-Institut fur Mathematik in Bonn, the IBS Center for Geometry and Physics in Pohang, and The Mathematical Sciences Research Institute in Berkeley. While a student at CUNY, Hirsh did significant work in three areas: homotopy invariance of algebraic structures, Koszul duality theory, and derived deformation theory. While a postdoc at MIT he worked on model structures for coalgebras. His contributions are impressively varied, but they are all typical of Hirsh's skill for discovering a simple elegant theorem that integrates a number of known results as corollaries and applies to situations previously out of reach.