EXHIBIT 21
LIST OF SIGNIFICANT SUBSIDIARIES
JURISDICTION OF INCORPORATION
Dyn Specialty Contracting, Inc.
Virginia
MES Holdings CorporationDelaware
EMCOR Construction Services, Inc.Delaware
EMCOR International, Inc.Delaware
EMCOR Mechanical/Electrical Services (East), Inc.Delaware
EMCOR (UK) LimitedEngland
EMCOR Group (UK) plcEngland
EMCOR Facilities Services, Inc.Ohio
EMCOR-CSI Holding Co.Delaware
FR X Ohmstede Acquisitions Co.Delaware
RepconStrickland, Inc.Delaware