Thomas Leeser is the founder and principal of LEESER Architecture, an internationally recognized New York-based architecture and design practice. His work spans cultural, museum, performing arts, commercial, residential, and educational projects in the United States and internationally.

Before founding LEESER Architecture in New York in 1989, Leeser worked with Eisenman Architects. His work explores the relationship between architecture, culture, technology, and experience, with particular emphasis on projects that challenge conventional relationships between program, circulation, material, and public space.

In parallel with his professional practice, Leeser is a tenured Professor of Architecture at Pratt Institute and has taught at institutions including Cornell University, Harvard University, Columbia University, The Cooper Union, Princeton University, and Parsons School of Design.