Alliance Technical Group Acquires Slipstream Environmental Services

Alliance Technical Group Acquires Environmental 360

June 20, 2025

Environmental Services

Alliance Technical Group acquired Environmental 360, LLC to expand its environmental consulting, monitoring, and compliance capabilities. The deal strengthens Alliance's onsite field services and emissions/compliance monitoring offerings for industrial clients across the United States.

Alliance Technical Group Acquires Four Environmental Laboratories Nationwide

November 17, 2023

Environmental Services

Alliance Technical Group, a Morgan Stanley Capital Partners–backed environmental testing and services platform, has acquired four independent environmental laboratories — Summit Environmental Technologies (Cuyahoga Falls, OH), Fremont Analytical (Seattle, WA), Orange Coast Analytical (Los Angeles, CA / Phoenix, AZ) and CHESTER LabNet (Portland, OR) — to build a nationwide laboratory network. The add-on deals expand Alliance's capabilities beyond air testing into water, hazardous waste, soil and PFAS/XRF analyses and broaden its geographic coverage across the United States.

Morgan Stanley Capital Partners Acquires Alliance Technical Group from Align Capital Partners

July 20, 2021

Environmental Services

Morgan Stanley Capital Partners (MSCP) has acquired a controlling interest in Alliance Technical Group, a Decatur, Alabama–based provider of air emissions testing, monitoring and analytical services, from Align Capital Partners. MSCP will partner with Alliance's management led by CEO Chris LeMay to continue geographic expansion and M&A-driven growth while the management team and employees retain a meaningful ownership stake.

Alliance Technical Group Acquires CK Environmental

June 28, 2022

Environmental Services

Decatur, Alabama-based Alliance Technical Group has acquired CK Environmental, an air emissions testing and environmental consulting firm headquartered in Canton, Massachusetts. The acquisition, which closed on June 28, 2022, adds CK Environmental's stack testing, QA/QC and maintenance capabilities to Alliance's national source-testing and emissions monitoring platform.

Alliance Technical Group Acquires Emission Monitoring Service, Inc. (EMSI)

April 1, 2021

Environmental Services

Alliance Technical Group, a portfolio company of Align Capital Partners, acquired Emission Monitoring Service, Inc. (EMSI) in a transaction that closed April 1, 2021. EMSI, headquartered in Baytown, Texas, provides emissions leak detection, repair and regulatory compliance services and employs more than 300 technicians; the deal provided liquidity to an absentee majority owner and expands Alliance's environmental services footprint and capabilities.

Blackstone Energy Transition Partners Acquires Alliance Technical Group

January 6, 2026

Environmental Services

Funds affiliated with Blackstone Energy Transition Partners and other Blackstone funds have acquired Alliance Technical Group (ATG), a Decatur, Alabama–based provider of environmental testing, monitoring and compliance services. ATG operates more than 60 offices and labs across the U.S. and Canada with over 2,200 employees; terms were not disclosed.