
2025 Planet Positive Awards > People > Rising Star Winner
Casey Castor
Director of Sustainability, Practice
Castor is Director of Sustainability at Practice, a mid-sized firm located in Pasadena, California, working on education, housing, and civic projects. From iterative energy modeling and embodied carbon analysis to equitable funding strategies for affordable housing, he leads the effort to ensure that high-performance design is accessible and impactful, especially for underserved communities across Southern California. Over the last 18 months, he has worked with the firm’s leadership team to expand its baseline services and formats into a potential new business unit that would allow clients the flexibility to explore more rigorous options and analyses beyond their original scope.
Beyond the office, he serves as vice-chair of the AIA Los Angeles Committee on the Environment. He also cofounded Mack Research, Mack Research, a clean-tech research company that explores decentralized wind energy solutions for urban architecture, such as a modular wind energy facade system designed for retrofit and new build applications on mid-rise buildings.
“What distinguishes Casey is his collaborative approach and belief that climate action must be shared,” says Ali Barar, managing principal at Practice. “He brings people into the solution: Staff, consultants, community stakeholders, and policy leaders are engaged to create momentum through optimism, clarity, and strategic alignment.”
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