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Subsidiary						Jurisdiction of Incorporation

Aerial Lighting & Electric, Inc.						Connecticut
Azimuth Communications, Inc.						Oregon
Bayonet Plumbing, Heating & Air Conditioning, LLC						Florida
Calumet Armature and Electric, L.L.C.						Illinois
Edmonson Electric, LLC						Florida
Freeman Enclosure Systems, LLC						Ohio
Hotchkiss Alarms, LLC						Connecticut
ICS Holdings LLC						Arizona
IES Commercial, Inc.						Delaware
IES Communications, LLC						Delaware
IES Consolidation, LLC						Delaware
IES Infrastructure Solutions, LLC						Delaware
IES Investments, LLC						Delaware
IES Management LP						Texas
IES Management ROO, LP						Texas
IES OK RE, LLC						Oklahoma
IES Operations Group, Inc.						Delaware
IES Residential, Inc.						Delaware
IES Shared Services, Inc.						Delaware
IES Subsidiary Holdings, Inc.						Delaware
Integrated Electrical Finance, Inc.						Delaware
K.E.P. Electric, Inc.						Ohio
Key Electrical Supply, Inc.						Texas
Magnetech Industrial Services, Inc.						Indiana
NEXT Electric, LLC						Wisconsin
Plant Power and Control Systems, L.L.C.						Alabama
Southern Industrial Sales and Services, Inc.						Georgia
STR Mechanical, LLC						North Carolina
Technibus, Inc.						Delaware
Technical Services II, LLC						Virginia
Thomas Popp & Company						Ohio
Wedlake Fabricating, Inc.						Oklahoma