[3] He moved to the University of Texas at Austin for his graduate studies, where he completed a master's degree and a doctorate.

[2] His doctoral studies were followed by post-doctoral research at the Chair of Process Systems Engineering at RWTH Aachen where his research focused on studying the effect of uncertainty in parameters on controlled nonlinear systems.

His research at Texas A&M focused on the development and application of systems analysis approaches to biological networks with a particular emphasis on signaling pathways involved in inflammation.

[6] In 2012, Hahn moved to the Rensselaer Polytechnic Institute as a professor and became the head of the Biomedical Engineering Department in 2013.

[7] His research focus at Rensselaer was on the application of systems concepts to the life sciences with a specific emphasis on the pathophysiology of autism.