Alliance Builds on its California Presence with Acquisition of Horizon Air Measurement Services

Align Capital Partners’ (“ACP”) environmental testing and compliance platform Alliance Technical Group (“Alliance” or the “Company”) has acquired Horizon Air Measurement Services, Inc. (“Horizon”). Headquartered in Camarillo, CA, Horizon provides source emission (or stack) testing services to customers across the Western United States.

Acquiring Horizon adds the talent necessary to continue the expansion of all Alliance service lines in the region. “Adding resources to our rapidly expanding West Coast operations was imperative, and Horizon delivers on both strategic and geographic fit,” noted Alliance CEO Chris LeMay. “As Alliance continues to expand, we look to partner with high quality, customer-focused companies across all of our services lines.”

Richard Vacherot, Technical Director at Horizon, echoes LeMay’s sentiment on the two companies being a natural fit, “We’ve worked with Alliance to put our employees on the same team and are very excited to achieve this goal. The ability to offer the deeper bench and additional services that Alliance brings to the table will help us continue to service and grow our customer base.”

Together, Alliance and Horizon have a national footprint with coast-to-coast offices and more than 750 employees, providing technical expertise across a diverse range of end markets. This acquisition represents the Company’s twelfth since 2015 and fifth of 2021.

This transaction also marks an exciting milestone for ACP. Horizon is the 50th acquisition the firm has closed since raising its inaugural fund in 2016. ACP’s deal roster is comprised of 13 platforms and 37 add-ons representing companies from 21 unique states and countries.

“As ACP’s first portfolio company investment, it’s been exciting to see Alliance scale over the last five years alongside our growing firm,” ACP Managing Partner Rob Langley said. “Chris and his team have worked tirelessly to build Alliance into the industry leader that it is today.”

Operating Partner Dave Perotti, Principal Jack Parks, and Associate Chris Collins worked alongside Mr. Langley on the transaction.

About Alliance Technical Group

Headquartered in Decatur, AL, Alliance is the leading provider of air emissions testing and monitoring solutions to customers throughout the United States. With expertise in a variety of end markets, Alliance is focused on people, process, and technology to provide unparalleled response and service to assist customers with meeting their air compliance and risk reduction goals. For more information, visit,, or

About Align Capital Partners

Align Capital Partners is a growth-oriented private equity firm that partners with business owners and management teams to create shared success. ACP manages $775 million in committed capital with investment teams in Cleveland and Dallas. ACP brings experience and resources to help lower-middle market companies accelerate their growth, to the benefit of management, employees, and the firm’s investors. ACP makes control investments in differentiated companies within the business services, technology, specialty manufacturing and distribution, and healthcare sectors. For more information, visit

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