Cornerstone Building Brands, a leading manufacturer of exterior building products in North America, today announced that Austin So has been appointed Executive Vice President, General Counsel and Corporate Secretary, effective July 13, 2026. In this role, Austin will lead the company’s legal function and provide strategic counsel on corporate governance, compliance, risk management, government relations and business transformation priorities.
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Austin So, Executive Vice President, General Counsel and Corporate Secretary, Cornerstone Building Brands. Photo courtesy of Cornerstone Building Brands.
“Austin brings exceptional leadership experience, industry knowledge and a proven ability to help businesses successfully navigate change and growth,” said Gunner Smith, Chief Executive Officer of Cornerstone Building Brands. “He’s a strategic, business-oriented leader and I’m confident he will be a strong partner as we continue to strengthen our business, support our customers and execute on our strategic priorities.”
Austin brings nearly 25 years of broad legal and executive leadership experience, including 14 years as General Counsel across publicly traded, private equity-controlled and global conglomerate organizations. He most recently served as Senior Vice President, General Counsel, Head of Government Relations and Chief Sustainability Officer at Armstrong World Industries, where he helped align legal, government relations and sustainability initiatives with the company’s growth strategy.
Previously, Austin served as Senior Vice President, Chief Legal Officer and Secretary at StoneMor Inc., and, earlier in his career, he was Division General Counsel and Secretary for Heraeus Holding GmbH.
“I’m honored to join Cornerstone Building Brands at such an important time for the organization,” Austin said. “The company’s market leadership, strong product portfolio and commitment to serving customers create a compelling foundation for continued growth. I look forward to partnering with team members across the organization to support the company’s strategic priorities and help create long-term value.”
Austin began his legal career in private practice with leading law firms, including Cravath, Swaine & Moore LLP. He holds a bachelor’s degree in government from Harvard University and a Juris Doctor from the University of Pennsylvania Law School.
About Cornerstone Building Brands
Cornerstone Building Brands is a leading manufacturer of exterior building products for residential and low-rise non-residential buildings in North America. Headquartered in Cary, N.C., we serve residential and commercial customers across the new construction and Repair & Remodel (R&R) markets. Our market-leading portfolio of products spans vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems and metal accessories. Cornerstone Building Brands’ broad, multi-channel distribution platform and expansive national footprint includes approximately 19,400 team members at manufacturing, distribution and office locations throughout North America. Corporate stewardship is embedded in our culture and guides our commitment to responsible growth, environmental care and community impact. For more information, visit us at cornerstonebuildingbrands.com.
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