The focus of Heymann’s writing, research, and practice is the relationship of buildings and landscapes, particularly natural landscapes. Heymann's architectural work has been nationally published and recognized with design honors, including selection for Emerging Voices by the Architecture League of New York. In 2014 he was elevated to the College of Fellows of the American Institute of Architects.
Heymann is a contributing writer for Places Journal. His Places essay Landscape is our Sex received the 2012 Bradford Williams Medal from the American Society of Landscape Architects. Heymann's book of short stories, My Beautiful City Austin, was published in November, 2014. Heymann has been a visiting scholar at the Bogliasco Foundation Liguria Study Center, the Rockefeller Bellagio Center, the Museum of Fine Arts Houston Dora Maar House in Menerbes, and the American Academy in Rome; and he was a resident artist in photography at the MacDowell Colony, Ucross Foundation, and on The Arctic Circle program.
In addition to design studios, Heymann teaches two required courses – Site Design and Architecture Theory 1 – as well as the theory seminar Architectural Photography : Digital Potential. He has taught for the SOA in Italy, and has taken students to study in Japan. Heymann's teaching has received numerous honors, including the University of Texas System Regents’ Outstanding Teaching Award, the Texas Society of Architects’ Romeiniec Teaching Award, the Friars’ Centennial Award, and the University of Texas Ex-student Teaching Award. He is an Association of Collegiate Schools of Architecture Distinguished Teaching Professor, a University of Texas Distinguished Teaching Professor, and was included in Design Intelligence's list of Most Admired Educators in 2017. Heymann served as Associate Dean for Undergraduate Programs from 1998 to 2003.
- B. Arch, Cooper Union; M. Arch, Harvard G.S.D.