 He returned to the US to join the Columbia University, from where he completed his MPhil in 2011 and PhD in 2013 from the Department of Earth and Environmental Sciences.During this period he concurrently worked as a researcher at the Division of Paleontology, American Museum of Natural History.He became a Chancellor's Fellow in Vertebrate Palaentology at the School of GeoSciences in the University of Edinburgh in February 2013.