Clearlake Capital Group to Acquire Qualus Corporation From New Mountain Capital

New Mountain Capital Acquires Qualus Power Services from Mason Wells

June 1, 2021

Infrastructure

New Mountain Capital has acquired Qualus Power Services, a provider of engineering and specialized technical field services to utility and private power grid infrastructure, from Mason Wells. Qualus operates from more than 20 field and engineering locations and employs over 600 technical staff; Harris Williams advised Mason Wells on the sale.

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 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.

Clearlake Capital Completes Acquisition of Quest Software from Francisco Partners

February 2, 2022

Cybersecurity

Clearlake Capital Group completed its acquisition of Quest Software from Francisco Partners, making Clearlake the majority shareholder and partnering with Quest’s existing management team to pursue a buy-and-build strategy. The investment aims to accelerate Quest’s cloud/SaaS adoption, expand its identity-centric cybersecurity, data intelligence, and IT operations management offerings, and drive growth organically and through M&A.

Qualus Corporation Acquires dk Engineering

September 3, 2025

Engineering Services

Qualus Corporation has acquired dk Engineering, a Walnut Creek, California-based multidisciplinary engineering and consulting firm that supports utilities and renewable energy developers across the western U.S. The deal adds dk’s advisory, planning, geospatial, modeling and construction management capabilities to Qualus’ power infrastructure services and expands Qualus’ regional footprint and technical capabilities.

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.