Raised in Atlanta, Georgia, Mary concentrated in American Civilization at Brown University. She received her Masters of Architecture degree from MIT, where she studied and worked with Donlyn Lyndon. After five years in Washington D.C. with Hartman-Cox Architects, she moved to San Francisco to marry William Turnbull and join his architectural practice.
Mary and partners Eric Haesloop and Stefan Hastrup continue to practice in San Francisco and pursue William Turnbull’s commitment to site sensitive sustainable design. Mary has served on many juries, including the AIA National institute Honor Awards for Architecture. She has taught architectural design at UC Berkeley and was the Friedman Visiting Professor of Professional Practice in 2008. Mary became a Fellow of the American Institute of Architects in 2006.