General Motors has announced the appointment of Cassandra Garber as its new Chief Sustainability Officer, marking a pivotal leadership move as the automaker accelerates its transition toward carbon neutrality and electric mobility. Garber steps into the role following the November 2024 retirement of Kristen Siemen, who served GM for three decades and led the company’s early climate and ESG initiatives.

Garber joins from Dell Technologies, where she served as CSO and helped shape the tech giant’s circular economy, responsible sourcing, and carbon reduction strategies. Her cross-sector experience—from tech to consumer goods—signals GM’s intent to bring a fresh perspective to its climate journey.

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From Circuit Boards to Car Batteries: A New Era at GM

Cassandra Garber’s sustainability philosophy blends purpose with performance. In a personal LinkedIn post, she shared that her new GM role feels like a full-circle moment—growing up in a car-loving family in Indiana and now helping reshape one of the world’s largest automakers from the inside out.

“I’ve learned that sustainable business is smart business,” she wrote. “Reducing risk, seizing innovation, and delivering meaningful impact—that’s the future. It’s hard, but transformative.”

Garber brings over 15 years of experience in sustainability leadership roles at Dell, McKesson, 3M, and Coca-Cola. Her appointment comes at a critical moment as automakers globally confront a challenging EV transition and pressure to decarbonize supply chains and operations.

GM’s Bold Climate Commitments Face a Changing Road Ahead

GM has pledged to become carbon neutral across its global products and operations by 2040 and to power all U.S. facilities with 100% renewable electricity by 2025. However, recent EV market slowdowns and shifting regulatory signals are testing the auto industry’s climate resolve.

Despite these headwinds, GM continues to invest in electrification, including the expansion of its Ultium EV platform and the anticipated launch of models like the all-electric Cadillac Escalade IQ.

Garber’s leadership is expected to align sustainability more closely with GM’s core business strategy, helping navigate regulatory uncertainty, stakeholder scrutiny, and emerging supply chain risks—all while reinforcing the company’s public ESG commitments.

Rewiring ESG for the Next-Gen Auto Industry

Garber's arrival symbolizes more than a personnel change—it reflects a growing belief that climate competence is mission-critical in legacy industries. By appointing a CSO with broad, cross-sector expertise, GM is preparing for a future where ESG performance directly influences brand value, investor confidence, and market competitiveness.

And it’s no coincidence her first day at GM lands on Earth Day—Garber’s vision for a cleaner, smarter automotive future is just getting started.

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