Houlihan Lokey Advises Harvest Partners

Houlihan Lokey is pleased to announce that funds managed by Harvest Partners, LP (Harvest) have completed the acquisition of Integra Testing Services (Integra) from Keystone Capital Management, LP (Keystone).

Integra is a national provider of commercial HVAC testing, adjusting, and balancing (TAB) services and controlled environment (CE) testing and certification to a diverse range of end markets. The company’s management team, led by CEO Dominic Mazzolini, will continue to lead Integra and remain significant owners of the business.

By combining TAB and CE services capabilities under one platform, Integra delivers an attractive turnkey solution to complex facilities and end markets where testing failure and downtime costs are high, particularly in life sciences, healthcare, education, government, and data center applications. With a strong focus on delivering unbiased testing and verification services, Integra helps to ensure optimal conditions for building owners, design professionals, and end users. Integra offers a full suite of services, including cleanroom certification, fume hood testing, pharmacy compliance testing, duct leakage testing, air barrier testing, and commissioning services. Integra’s team of more than 600 professionals provides services globally with 30 office locations throughout the U.S., Mexico, and Guam.

Founded in 1981, Harvest is an established private equity firm with over 40 years of experience investing in middle-market companies and partnering with high-quality management teams to build growing businesses. The firm invests in service-oriented businesses across four core sectors: business services and industrials, commercial services, consumer services, and healthcare services. This strategy leverages Harvest’s multi-decade experience in financing organic and acquisition-oriented growth opportunities. The firm has more than $20 billion in assets under management as of March 31, 2026.

Keystone was founded in 1994 with the objective of investing the personal capital of its partners in high-quality businesses, patiently building long-term value alongside management through organic growth and strategic acquisitions. Keystone currently manages more than $1 billion in capital commitments across two funds. To maintain consistency with its historical investment strategy and align interest across all stakeholders, the principals of Keystone collectively represent the largest single investor in both of these funds, which have been structured with an extended life to support Keystone’s belief in investment-period flexibility. Over the course of its history, Keystone has completed more than 50 platform investments and over 200 total acquisitions with a focus on commercial and industrial services, food and beverage, industrial technology, professional services, and technical services.

Houlihan Lokey served as a financial advisor to Harvest. This transaction exemplifies the continued success of Houlihan Lokey’s dedicated coverage of the testing, inspection, certification, and compliance (TICC) and facility services sectors.

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