Leon is a founding principal of MdeAS, establishing Moed de Armas Architects in 1991 after a long career at Skidmore, Owings & Merrill. He has a reputation, among clients and colleagues, for his skills of management and technical direction demonstrated on projects over the course of 60 years. To date, his career encompasses responsibility for the management and technical direction of significant projects, representing an aggregate area of more than 25 million square feet of construction.

Leon has led many of MdeAS’ most complex and challenging projects in and out of New York City, where he is fully committed to the execution of detail and technical design. He has worked on various project types, most notably, Cornell University Medical Center, New York Presbyterian Hospital, Gotham Center, Queens Plaza, Lyndon Baines Johnson Library Museum and Dallas Airport Expansion in Texas and First Canadian Place in Toronto.


Registered Architect: Connecticut, District of Columbia, Florida, Illinois, Massachusetts, New Jersey, New York
Member, National Council of Architectural Registration Boards
Board of Trustees, Lifetime Trustee, Pratt Institute
Board of Directors, Friends of Bezalel Academy of Arts and Designs, Inc.


Pratt Institute, B. Arch.