United Building Solutions Acquires McCarl’s Services Incorporated

Company accelerates growth as a national HVAC platform with expansion into Western Pennsylvania

CONSHOHOCKEN, Pa.--(BUSINESS WIRE)--United Building Solutions (“UBS” or the “Company”), a leading provider of heating, ventilation, and air conditioning (“HVAC”) services across the United States, today announced that it has acquired McCarl’s Services Inc. (“McCarl’s”), a commercial and industrial HVAC and refrigeration (“HVACR”) solutions specialist with a strong presence in western-Pennsylvania along with Ohio and West Virginia.

Based in Cranberry Township, Pa., McCarl’s has over eighty years of experience in commercial HVAC, refrigeration, and mechanical services. One of the largest service-focused operators in the region, McCarl’s serves commercial and industrial customers in critical end markets where reliability is paramount. McCarl’s will operate as a division of UBS under the continued leadership of its president, Mike McCarl.

“Since its founding in 1946, McCarl’s has built a strong regional reputation for its commitment to service and excellence, making them a valuable addition to our rapidly expanding network,” said David Leathers, CEO of United Building Solutions. “In addition to extending our geographic reach, the acquisition of McCarl’s aligns with our broader strategy of providing specialized service solutions that support organizations in critical market sectors.”

The transaction is UBS’ third add-on acquisition following its establishment as a national commercial HVAC services platform by AE Industrial Partners in 2025. Together, these transactions have expanded the Company’s footprint from three Mid-Atlantic states to 11 markets across the Northeast, Midwest, Southeast, and South-Central United States.

“Having served the western-Pennsylvania region for three generations, joining UBS’ rapidly expanding network will allow us to enhance our capabilities and accelerate growth while maintaining our commitment to technical expertise, superior quality, and outstanding service,” said Mike McCarl, President of McCarl’s.

“The integration of McCarl’s into the UBS network marks another milestone in our vision of creating a nationally-scaled commercial HVAC platform that can meet the growing demands for comprehensive mechanical services for mission-critical infrastructure,” added Bryan McElwee, Partner at AE Industrial. “McCarl's is a service-first operator with deeply embedded customer relationships, specialized technical capabilities, and a strong management team that makes it an ideal fit with the UBS platform. Mike McCarl and his team have built something exceptional and we're excited to give him the resources and infrastructure to accelerate what's already working.”

PwC served as financial advisor to AE Industrial. Three Sixty Seven Advisors served as financial advisor to McCarl’s.

About AE Industrial Partners:
AE Industrial Partners is a private investment firm with approximately $9.2 billion of assets under management as of December 31, 2025, focused on investing in technologies and services considered critical to national & economic security. Since 2015, AE Industrial has completed more than 155 investments in market-leading companies that benefit from its deep industry knowledge, operating experience and network of relationships across the sectors where the Firm invests (national security, aerospace and industrial services). With a commitment to driving value creation in partnership with the management teams of its portfolio companies, AE Industrial invests across private equity, venture capital and aerospace leasing. AE Industrial is headquartered in Boca Raton, FL and has an office in Washington, D.C. Learn more at www.aeroequity.com.

About United Building Solutions:
United Building Solutions (“UBS”) is a premier provider of HVAC, building analytics, and building controls solutions. Operating through multiple brands with proven expertise across the United States, UBS integrates shared capabilities with distinct offerings to deliver comprehensive building performance improvement services. With over 30 years of experience and more than 2,000 customers served, UBS specializes in optimizing building systems and operations, improving energy efficiency, and enhancing overall performance.

About McCarl’s Services Inc.:
McCarl’s Services is a leading provider of commercial and industrial HVAC and refrigeration (“HVACR”) solutions, serving clients across western Pennsylvania, eastern Ohio, and northern West Virginia. Founded in 1946, the company specializes in the design, installation, maintenance, and repair of complex HVACR systems. McCarl’s partners with organizations across industries including healthcare, manufacturing, energy, and commercial real estate to improve system performance, reduce energy costs, and minimize downtime. With a focus on proactive maintenance, engineering-driven solutions, and long-term cost efficiency, McCarl’s delivers reliable, customized service backed by decades of technical expertise.