New Mountain Capital Acquires Qualus Power Services from Mason Wells

Clearlake Capital Group Acquires Qualus Corporation

March 28, 2026

IT Services

Clearlake Capital Group completed its acquisition of Qualus Corporation from New Mountain Capital. Qualus is a pure-play, end-to-end electric power solutions platform providing advisory, engineering, program management, digital solutions, energy efficiency, and specialized field services to modernize and strengthen the U.S. and Canada power grid.

Qualus Corporation Acquires Aquawolf, Transmission & Distribution Engineering Subsidiary of Mammoth Energy

December 3, 2025

Engineering Services

Qualus Corporation acquired Aquawolf, the transmission and distribution engineering subsidiary of Mammoth Energy, expanding Qualus' high-voltage transmission and grid modernization capabilities and adding offices in San Diego, Denver and Vancouver, Washington. The acquisition deepens Qualus' engineering and construction support services across the project life cycle and strengthens its technical capabilities in transmission and distribution design, resiliency and grid hardening.

Qualus Corporation Acquires ASSET Engineering

June 17, 2024

Energy

Qualus Corporation has acquired ASSET Engineering, a Jackson, Mississippi–based power engineering and consulting firm specializing in renewable generation development, battery energy storage systems, microgrids, and distributed energy resources. The acquisition expands Qualus' capabilities in renewables, energy storage, and critical-infrastructure support for clients such as utilities, developers, and data centers and broadens its U.S. footprint.

Qualus Corporation Acquires GridBright

October 9, 2023

Energy

Qualus Corporation, a portfolio company of New Mountain Capital, has acquired GridBright, a Silicon Valley–area technology solutions firm specializing in grid integration software, systems integration, and advisory services. The deal (terms not disclosed) expands Qualus’ capabilities in grid modernization, resiliency, security, and renewable interconnection services; AEC Advisors advised Qualus and Capstone Partners advised GridBright.

Qualus Acquires Phoenix Engineering Services, Inc.

November 17, 2021

Utilities

Qualus, LLC, a provider of engineering and technical field services to utilities, acquired Phoenix Engineering Services, Inc., an Atlanta-area engineering and testing firm. The acquisition expands Qualus’s service offerings—adding relay and substation testing, NERC PRC studies, panel building and utility software development—to strengthen capabilities for utility, municipal, commercial and renewable clients.

Qualus Acquires Patterson Power Engineers, LLC

August 31, 2021

Engineering Services

Qualus, LLC acquired Patterson Power Engineers, LLC, a Chattanooga-based power system protection engineering firm, to strengthen Qualus’s protection engineering capabilities and technical services offering for utilities. The deal brings Patterson’s specialized engineering team into Qualus’s network of field service and engineering offices, providing expanded capabilities and opportunities for employees.