 NORWALK, Conn.--BUSINESS WIRE--EMCOR Group, Inc. NYSE: EME, a Fortune 500 leader in mechanical and electrical construction, industrial and energy infrastructure, and building services for a diverse range of businesses, announced that it has completed its acquisition of Dallas Mechanical Group, LLC DMG, a leading full-service provider of mechanical construction and maintenance services, headquartered in Dallas, TX. DMG will be part of EMCORs Building Services segment. DMG provides sing 