Ellen Mitchell-Kozack

Ellen Mitchell-Kozack

Vice President
Chief Sustainability Officer
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Sustainable design and public interest design leadership

Ellen’s goal is to leverage LEO A DALY’s integrated design expertise to affect positive change. She applies a humanitarian and environmental lens to architecture to benefit clients, the communities we live in and the future of our planet.

As chief sustainability officer, Ellen leads LEO A DALY’s strategic initiatives in sustainable design worldwide, including Environmental Social & Governance, alignment with the UN Global Compact and Sustainable Development Goals, carbon footprint assessment and social impact.

A nationally recognized voice in sustainable design and public interest design, as senior vice president, director of sustainability at HKS, she led the firm’s DesignGreen studio and founded Citizen HKS, an impact initiative focused on leveraging sustainable design to address growing humanitarian needs of communities around the world. She has managed certification of more than 60 LEED projects worldwide, totaling $2.8 billion in construction, including 50 United Nations Plaza in San Francisco and Walter Reed National Military Medical Center, Bethesda, Maryland.

Ellen was named one of several “Heroes and Mavericks” by Boutique Design in 2018, a BD+C 40 Under 40 winner in 2015 and won Emerging Leader Awards from AIA Dallas (2012) and the Design Futures Council (2013). Her work has been featured in Dezeen, Fast Company, Architectural Digest and Designboom.

She is also an accomplished public speaker with previous engagements at Greenbuild (2018), NeoCon (2018), AIA National Convention (2017) and SXSW Eco (2015).