Integrated Energy Services Acquires MACH Energy

SSOE Group Acquires Integrated Engineering Services (IES)

October 13, 2023

Engineering Services

SSOE Group has acquired Santa Clara–based Integrated Engineering Services (IES), effective October 13, 2023. The acquisition adds IES's expertise in cleanroom design, lab and industrial ventilation, specialty/toxic gas distribution and process chemical systems, while preserving IES's team and expanding SSOE's presence in Santa Clara, Atlanta and Austin.

Apax Global Impact Fund Acquires Controlling Stake in Integrated Environmental Solutions (IES)

February 27, 2024

Software

The Apax Global Impact Fund, advised by Apax Partners LLP, will acquire a controlling stake in Integrated Environmental Solutions (IES), a climate‑tech company that provides building performance simulation software and consultancy to decarbonise the built environment. The investment—Apax Global Impact's first climate‑focused deal—will support IES's growth and scale its software and services to meet rising demand for sustainability solutions in building design, retrofit and operation.

Eagle Merchant Partners Invests in ES Integrated

September 29, 2025

Industrial Services

Eagle Merchant Partners, an Atlanta-based private equity firm, has made a strategic investment in ES Integrated, an industrial cleaning, environmental and waste services provider headquartered in Charleston, South Carolina. The partnership will support ESI's geographic and service-line expansion, pursue strategic acquisitions, and retain the company's existing leadership team.

MasTec Acquires Infrastructure and Energy Alternatives (IEA)

July 25, 2022

Energy

MasTec has agreed to acquire Infrastructure and Energy Alternatives, Inc. (IEA) in a cash-and-stock transaction valued at approximately $1.1 billion, with IEA shareholders receiving $14.00 per share. The deal expands MasTec's clean energy and infrastructure capabilities—adding nearly 6,000 IEA employees, union-based clean energy power generation services, and broadened renewable project and heavy-civil expertise—and is expected to close in late Q4 2022 subject to customary approvals.

Cloud Equity Group Acquires Integrated Enterprise Solutions

July 19, 2021

IT Services

Cloud Equity Group (CEG) acquired New York-based Integrated Enterprise Solutions (IES) as a new standalone platform investment. IES — an IT services provider founded in 1998 that offers managed services, cloud, security and HIPAA analysis to small and mid-sized businesses — will continue to operate under its existing management while CEG looks to accelerate growth and expand the company’s geographic reach.

GenServe Acquires Power and Energy Services, Inc. (PES)

November 20, 2025

Industrial Services

GenServe, a PE-backed provider of backup power solutions, has acquired Power and Energy Services, Inc. (PES), an Austell, Georgia-based generator maintenance, repair, rental and equipment solutions provider. The acquisition expands GenServe's presence in the Southeastern United States, strengthens technical capabilities, and establishes a regional operations hub to support future growth.