Alejandra Trejo is an economist, holds a Master degree in Regional Economics and a PhD in Development Studies from the University of East Anglia in the UK. She is currently a professor at the Centre for Demographic, Urban and Environmental Studies, El Colegio de Mexico. She was the academic coordinator of the master program in Urban Studies in this center (2013-2015). She was awarded the Mexico Studies Chair with a Fulbright-Garcia Robles Grant at the University of California (2018). Recently she has been a visiting researcher at CREPIB in Colombia (2018) and a visiting research fellow at the Brussels Centre for Urban Studies, Vrije Universiteit (2019). She is a member (level II) of the National Researchers System in Mexico, ambassador to Mexico of the Regional Studies Association, and a UKRI International Development peer review college member. 

Her research agenda reflects significant interdisciplinary concerns about the issues of urbanisation, metropolitan expansion, urban and regional economic development, governance and policy.