Deal comes amid rising demand tied to electrification and infrastructure investment
Qualus provides advisory and engineering services to help plan, maintain, and upgrade electric power systems. Its work includes system design, on-site technical services, and software tools that support grid operations, including integrating renewable energy, managing outages, and enabling data sharing across power networks.
April 2, 2026|John McNulty
Clearlake Capital has agreed to acquire Qualus Corporation, a provider of advisory and engineering services supporting electric grid infrastructure, from New Mountain Capital.
Qualus provides advisory and engineering services to help plan, maintain, and upgrade electric power systems. Its work includes system design, on-site technical services, and software tools that support grid operations, including integrating renewable energy, managing outages, and enabling data sharing across power networks. The company serves utilities, data centers, renewable energy developers, and industrial customers. Qualus, led by CEO Greg Herasymuik, is headquartered north of Orlando in Lake Mary, Florida.
Greg Herasymuik
“Today marks an exciting milestone in Qualus’ journey,” said Mr. Herasymuik. “Qualus has established itself as a premier power solutions platform, providing specialized advisory, engineering, and field services to the power grid. The partnership with Clearlake brings strategic backing to further scale our capabilities and support our clients as they navigate increasingly complex operational requirements. We remain focused on our mission to ensure the long-term integrity and performance of the nation’s critical power infrastructure.”
New Mountain acquired Qualus from Mason Wells in March 2021. Since then, Qualus has pursued a platform build-out that includes acquisitions of Patterson Power Engineers (August 2021), Phoenix Engineering Services (November 2021), Tri Sage Consulting (December 2022), Ferreira Power Group (August 2023), GridBright (October 2023), Enkompass Power and Energy (February 2024), ASSET Engineering (June 2024), Linda Rogers & Associates (July 2024), Planet Forward Energy Solutions (December 2024), ADM Associates (July 2025), dk Engineering (September 2025), the North American transmission and distribution engineering business of John Wood Group (October 2025), and Aquawolf, the transmission and distribution engineering subsidiary of Mammoth Energy (December 2025).“We are proud to have supported Qualus over the last five years during a transformative period of significant growth. We thank Greg and the Qualus leadership team for our partnership together, and we are confident in the company’s future success,” said Joe Walker and Lars Johansson, managing directors at New Mountain, in a released statement.
“We see Qualus at the center of an industry facing a widening gap between grid demand and technical capacity,” said Naveen Shahani, a principal at Clearlake Capital. “By leveraging Clearlake’s capabilities, the company will be better equipped to serve the nation’s largest utility and commercial clients.”
“We are excited to partner with Greg and the Qualus team to address the nation’s aging power infrastructure,” said José E. Feliciano, co-founder and managing partner of Clearlake Capital, and Arta Tabaee, partner and managing director at Clearlake Capital, in a released statement. “The power sector is entering a sustained period of critical investment, and we anticipate demand will only intensify over the coming decades.”
Clearlake Capital invests in industrials and energy, software and technology-enabled services, and consumer sectors. The firm was co-founded by Mr. Feliciano and Behdad Eghbali in 2006 and is headquartered in Santa Monica, California. In May 2022, Clearlake Capital held a hard cap and oversubscribed final close of its seventh private equity fund, Clearlake Capital Partners VII LP, with $14.1 billion in commitments. The firm is currently raising it seventh fund with a reported target of $20 billion but has not yet had a final close.
New Mountain is an industry generalist and invests between $100 million and $500 million per transaction in companies with enterprise values typically between $100 million and $1 billion. The firm, founded in 2000 and headquartered in New York City, manages over $50 billion in aggregate assets in private equity, credit, net lease real estate, and public equity funds.
In January 2021, New Mountain closed its newest flagship fund, New Mountain Partners VI LP, with $9.6 billion of capital, and the firm’s first non-control private equity fund, Strategic Equity Fund I LP, with $640 million of capital.
“We are proud to have supported Qualus over the last five years during a transformative period of significant growth. We thank Greg and the Qualus leadership team for our partnership together, and we are confident in the company’s future success,” said Joe Walker and Lars Johansson, managing directors at New Mountain, in a released statement.
