 IRVINE, Calif. ORLANDO, Fla.--BUSINESS WIRE--Montrose Environmental Group, Inc. the Company, Montrose or MEG NYSE: MEG today announced the acquisition of MSE Group MSE, a leading provider of environmental assessment, compliance, engineering, and design services primarily to the U.S. federal government. MSEs leadership team, including President Miyoung Squire, will join Montrose, and the business will be integrated with the Companys Remediation and Reuse Segment. Terms of the 