Gregor is an Applied Microeconomist at the University of Sydney's School of Economics.
He is also affiliated with the Department of Economics at University of Hohenheim.

Before joining the University of Sydney, Gregor held a position as Senior Research Officer in the Department of Economics at University College London, Centre for Research and Analysis of Migration (CReAM).

His research focus is on Health, Education, and Public Economics, with a particular interest in the toolkit of Applied Microeconometrics and its application to Policy Evaluations.