David J. Lewis is a principal of LTL Architects (Lewis.Tsurumaki.Lewis) and Professor of Architecture at Parsons School of Constructed Environments. Through his research, teaching, and practice, David pursues fundamental transformations in the discipline of architecture brought about by regenerative material systems to address climate change. At Parsons he has served as the Dean of the School and on the faculty since 2002.  He leads courses on design in the age of embodied carbon and is committed to reframing pedagogy around climate justice.

Marking their second quarter century of practice, the Principals of LTL Architects—Paul Lewis, Marc Tsurumaki, and David J. Lewis—have refocused the practice to embrace and expand carbon sequestering materials through the seduction of architectural representation and work. This redefinition of the firm coincided with the release of Manual of Biogenic House Sections (ORO Editions, 2022), which articulates how plant-based and low-carbon materials can produce a profound rethinking of section in houses. The book is a follow up to Manual of Section (Princeton Architectural Press, 2016) which has now been printed in 7 languages.

Since founding in 1997, LTL Architects has been recognized for combining design innovation with unconventional pragmatism, including selection as the 2019 Firm of the Year Award from the AIA NY State, and induction into the Interior Design Hall of Fame. LTL Architects is the recipient of 14 AIA awards, and 6 Interior Design Best of Year awards, and their work is in the permanent collections of the MoMA and SFMoMA. They are authors of the monographs, Intensities (Princeton Architectural Press, 2013), Opportunistic Architecture (Princeton Architectural Press, 2008) and Situation Normal....Pamphlet Architecture #21 (Princeton Architectural Press, 1998), and the 2020 online publication, Manual of Physical Distancing (Issuu).

David has previously taught at Cornell University, University of Pennsylvania, University of Limerick, and Ohio State University; and holds the honorary position of Adjunct Professor of Architecture at the University of Limerick, Ireland.  David received a Bachelor of Arts in Political Science from Carleton College, a Master of Arts in the History of Architecture & Urbanism from Cornell University, and a Master of Architecture from Princeton University.