Julian Marshall is an Associate Professor of Environmental Engineering in the Department of Civil Engineering at University of Minnesota.
Marshall is co-founder and co-director of Acara Challenge, a program combining engineering with social entrepreneurship --- an approach Nicholas Kristof called a "21st-century answer to the student protesters of the 1960s." Marshall also founded and co-directs the Civil Engineering Peace Corps Masters International program, which offers a 3-year Masters degree in Civil Engineering (two semesters of coursework at UMN, followed by 27 months service in the Peace Corps).
Marshall's research is at the intersection of air pollution and public health, in exposure assessment: understanding how much pollution people breathe, and how to reduce those exposures. His specific areas of focus are
(1)  Air pollution impacts of urban form;
(2)  Air pollution and health impacts of transportation energy consumption;
(3)  In situ measurement of fine particles in developing countries.