Alpine Investors Launches New Residential Window and Door Platform, Mosaic

SAN FRANCISCO – November 10, 2025 – Alpine Investors (“Alpine”) today announced the launch of Mosaic Service Partners (“Mosaic”), a new platform company focused on partnering with and scaling residential window and door replacement providers across the United States. In conjunction with the launch, Mosaic welcomes The Window Experts (formerly known as Houston Window Experts), Weather Tite Windows and Windows on Washington to the platform.

Mosaic partners with established regional leaders in residential window and door replacement, empowering local teams to reach their full potential with professional training and development, cutting-edge tools and technology, and streamlined platform integration.

Mosaic is led by CEO Josh Feinberg, the former Chief Strategy & Transformation Officer at ABM Industries. The executive leadership team also includes Head of M&A Brian Willis, CFO Sean Gillick, and SVP of Operations Abhinav Ramani. Feinberg, Willis and Ramani are part of Alpine’s leadership talent ecosystem, bringing a blend of operating and investment expertise, while Gillick contributes over a decade of financial leadership experience. Together, their complementary backgrounds and depth of operational experience position Mosaic to grow into a leading national platform.

 “We launched Mosaic to partner with outstanding local window and door businesses and unlock new opportunities for growth,” said Feinberg. “The Window Experts, Weather Tite Windows and Windows on Washington are all trusted names in their communities, and we look forward to building on their strong foundations to expand their reach and impact.”

The Window Experts, founded by Jeff Ludy, serves the greater Houston area and is known for its breadth of product expertise and commitment to a transparent, customer-first approach. The company has become one of Texas’ leading providers of premium window and door replacement solutions.

“Joining Mosaic marks an exciting new chapter for our business,” said Ludy. “We’ve always been committed to putting customers first and delivering quality they can count on. With Mosaic’s support, we can continue to grow while staying true to the essence of what makes us great.”

Weather Tite Windows, founded by Mike Hollander, offers replacement windows and doors throughout the Tampa Bay area, with an emphasis on impact windows. The company provides a suite of services from window and door selection to installation, all backed by their signature lifetime warranty.

Windows on Washington, founded in 2005 by Eric and Tara Novotny and headquartered in Sterling, Virginia, provides window and door replacement solutions throughout the greater Washington, D.C. metro region. The company is recognized for expert workmanship, energy-saving solutions and a reputation built on education, fairness and exceptional service.

“We see robust long-term potential for the residential window and door replacement industry,” said Dan Sanner, Partner at Alpine Investors. “With an experienced leadership team and established partnerships with leading regional service providers, Mosaic is well-positioned for accelerated growth and excellent service delivery nationwide.”

Alpine has extensive experience in building and scaling successful residential services businesses, including Apex Service Partners and Vertex Service Partners. The firm’s approach centers on investing in people to accelerate growth while maintaining the integrity and heritage of the local brands established by founders.

About Mosaic Service Partners

Mosaic Service Partners is a national platform backed by Alpine Investors that partners with exceptional residential window and door replacement providers across the United States. The platform helps regional businesses scale by investing in technology, expanding marketing and sales capabilities, and attracting and developing top talent. Guided by a people-first philosophy, Mosaic supports its partners in delivering exceptional service to homeowners while building enduring, market-leading businesses.

About Alpine Investors

Alpine Investors is a people-driven private equity firm that is committed to building enduring companies by working with, learning from, and developing exceptional people. Alpine specializes in investments in companies in the software and services industries. Its PeopleFirst strategy includes a talent program which allows Alpine to bring leadership to situations where additional or new management is needed post-transaction. Alpine has $18.7B in assets under management and three offices in San Francisco, New York, and Salt Lake City. For more information, visit www.alpineinvestors.com.

Media Contact

Audrey Harris

aharris@alpineinvestors.com