
Steven Siger
Lawyer and builder who likes to solve problems by finding a creative path to yes
steven-siger
San Francisco, CA
Joined February 2026
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Summary
Steven Siger is a cofounder and COO/CLO at CNaught, a company focused on driving real climate impact through carbon credit portfolios. He is actively involved in the climate and sustainability sector, as evidenced by his posts about carbon removal and CNaught's initiatives. trellis+1
With extensive experience across legal, operational, and governmental roles, Steven has a unique background blending public service and tech leadership. He held significant positions in the Obama Administration, including Chief of Staff and Acting Deputy Assistant Attorney General at the U.S. Department of Justice, where he was recognized for his work on the U.S. v. Windsor implementation. trellis+4
Steven has a proven track record of leadership in early-stage tech companies, having served in senior legal and operational roles at Otter, Bungalow, Thumbtack, and Uber. His responsibilities often extended beyond legal affairs to include finance, government affairs, trust and safety, and HR, demonstrating a versatile and problem-solving approach to building and scaling organizations. trellis+3
He is an alumnus of Yale University (BA) and Stanford University Law School (JD with Distinction), providing a strong academic foundation for his career in law and technology. yale+1
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