Mihalis is currently a Professor of Mathematics at Princeton University. He is also an associated faculty member of the Department of Physics and a member of the “General Relativity and Analysis at Princeton” Center.
Mihalis is also a member of the Relativity and Gravitation Group of the Department of Pure Mathematics and Mathematical Statistics (DAMTP) of the University of Cambridge, the Centre for Theoretical Cosmology, the Cambridge Centre for Analysis and the “General Relativity and Analysis at Princeton” Center.

He studied mathematics at Harvard University and was awarded a BA in 1997. His pursued his PhD thesis under the supervision of Demetrios Christodoulou at Princeton University. He has won the Adams Prize writing on the subject Differential Equations in 2004 and the Whitehead Prize in 2009 for “his work on the rigorous analysis of hyperbolic partial differential equations in general relativity.