Gandelsonas taught at the
Institute for Architecture and Urban Studies from 1973 until 1984 and was the director of educational programs from 1981 until 1984. Later, as a Fellow of the Chicago Institute for Architecture and Urbanism (1988–1990), he refined his approach to urbanism—based on reading the plans of cities as if they were text—with a computational analysis of the Chicago plan and published it under the title
The Urban Text (1992). Throughout the decade, Gandelsonas continued to apply his unique approach to urbanism on projects in several American cities including Los Angeles, Boston, Chicago, Des Moines, New Haven and Atlantic City. He published the results of his research in the book
X-Urbanism (1999), presenting his theory on the relationship between architecture and the American City. In 2013, he started a new joint program with the University of São Paulo incorporating design studios and research on urban infrastructure. Gandelsonas became the first director of the Center for Architecture, Urbanism and Infrastructure (CAUI) at Princeton University in 2007 and remained in the post until 2013. With funding from Princeton University's Council for International Teaching and Research, the mission of CAUI was to build a global network of research focusing on the impact of rapid urban growth in the twenty-first century. He also published the first two CAUI books,
In search of the public (2013), a collection of essays that examine the question of public space at the beginning of the twenty first century; and
Garden [City] State (2013), a proposal for a slow infrastructure that takes as a case study the state of New Jersey. From 2014 to 2018, Gandelsonas was the Princeton University lead of the research network "Fluvial Metropolis" in partnership with the University of São Paulo, a program funded by the Princeton Council for International Teaching and Research. Currently Gandelsonas is the Principal Investigator of the Meadowlands research project funded by the High Meadows Environmental Institute. ==Honors and awards==